[Enhencement](Outfile/Export) Export data to csv file format with BOM (#30533)

The UTF8 format of the Windows system has BOM. 

We add a new user property to `Outfile/Export`。Therefore, when exporting Doris data, users can choose whether to bring BOM on the beginning of the CSV file.

**Usage:**
```sql
-- outfile:
select * from demo.student
into outfile "file:///xxx/export/exp_"
format as csv
properties(
    "column_separator" = ",",
    "with_bom" = "true"
);

-- Export:
EXPORT TABLE student TO "file:///xx/tmpdata/export/exp_"
PROPERTIES(
    "format" = "csv",
    "with_bom" = "true"
);
```

fe/fe-core/src/main/java/org/apache/doris/analysis/ExportStmt.java

@@ -103,6 +103,7 @@ public class ExportStmt extends StatementBase {
 
     private String maxFileSize;
     private String deleteExistingFiles;
+    private String withBom;
     private SessionVariable sessionVariables;
 
     private String qualifiedUser;
@@ -228,6 +229,7 @@ public class ExportStmt extends StatementBase {
         exportJob.setParallelism(this.parallelism);
         exportJob.setMaxFileSize(this.maxFileSize);
         exportJob.setDeleteExistingFiles(this.deleteExistingFiles);
+        exportJob.setWithBom(this.withBom);
 
         if (columns != null) {
             Splitter split = Splitter.on(',').trimResults().omitEmptyStrings();
@@ -354,6 +356,9 @@ public class ExportStmt extends StatementBase {
             // generate a random label
             this.label = "export_" + UUID.randomUUID();
         }
+
+        // with bom
+        this.withBom = properties.getOrDefault(OutFileClause.PROP_WITH_BOM, "false");
     }
 
     private void checkColumns() throws DdlException {

fe/fe-core/src/main/java/org/apache/doris/analysis/OutFileClause.java

@@ -136,6 +136,7 @@ public class OutFileClause {
     private static final String PROP_SUCCESS_FILE_NAME = "success_file_name";
     public static final String PROP_DELETE_EXISTING_FILES = "delete_existing_files";
     public static final String PROP_FILE_SUFFIX = "file_suffix";
+    public static final String PROP_WITH_BOM = "with_bom";
 
     private static final String PARQUET_PROP_PREFIX = "parquet.";
     private static final String SCHEMA = "schema";
@@ -155,6 +156,7 @@ public class OutFileClause {
     private long maxFileSizeBytes = DEFAULT_MAX_FILE_SIZE_BYTES;
     private boolean deleteExistingFiles = false;
     private String fileSuffix = "";
+    private boolean withBom = false;
     private BrokerDesc brokerDesc = null;
     // True if result is written to local disk.
     // If set to true, the brokerDesc must be null.
@@ -566,6 +568,11 @@ public class OutFileClause {
             processedPropKeys.add(PROP_FILE_SUFFIX);
         }
 
+        if (properties.containsKey(PROP_WITH_BOM)) {
+            withBom = Boolean.valueOf(properties.get(PROP_WITH_BOM)).booleanValue();
+            processedPropKeys.add(PROP_WITH_BOM);
+        }
+
         if (properties.containsKey(PROP_SUCCESS_FILE_NAME)) {
             successFileName = properties.get(PROP_SUCCESS_FILE_NAME);
             FeNameFormat.checkOutfileSuccessFileName("file name", successFileName);
@@ -805,6 +812,7 @@ public class OutFileClause {
         sinkOptions.setMaxFileSizeBytes(maxFileSizeBytes);
         sinkOptions.setDeleteExistingFiles(deleteExistingFiles);
         sinkOptions.setFileSuffix(fileSuffix);
+        sinkOptions.setWithBom(withBom);
 
         if (brokerDesc != null) {
             sinkOptions.setBrokerProperties(brokerDesc.getProperties());

fe/fe-core/src/main/java/org/apache/doris/load/ExportJob.java

@@ -166,6 +166,8 @@ public class ExportJob implements Writable {
 
     @SerializedName("tabletsNum")
     private Integer tabletsNum;
+    @SerializedName("withBom")
+    private String withBom;
 
     private TableRef tableRef;
 
@@ -219,6 +221,7 @@ public class ExportJob implements Writable {
         this.columnSeparator = "\t";
         this.lineDelimiter = "\n";
         this.columns = "";
+        this.withBom = "false";
     }
 
     public ExportJob(long jobId) {
@@ -554,6 +557,7 @@ public class ExportJob implements Writable {
         if (!deleteExistingFiles.isEmpty()) {
             outfileProperties.put(OutFileClause.PROP_DELETE_EXISTING_FILES, deleteExistingFiles);
         }
+        outfileProperties.put(OutFileClause.PROP_WITH_BOM, withBom);
 
         // broker properties
         // outfile clause's broker properties need 'broker.' prefix

fe/fe-core/src/main/java/org/apache/doris/load/ExportMgr.java

@@ -349,6 +349,7 @@ public class ExportMgr {
         infoMap.put("broker", job.getBrokerDesc().getName());
         infoMap.put("column_separator", job.getColumnSeparator());
         infoMap.put("format", job.getFormat());
+        infoMap.put("with_bom", job.getWithBom());
         infoMap.put("line_delimiter", job.getLineDelimiter());
         infoMap.put("columns", job.getColumns());
         infoMap.put("tablet_num", job.getTabletsNum());

fe/fe-core/src/main/java/org/apache/doris/load/ExportTaskExecutor.java

@@ -40,7 +40,6 @@ import org.apache.doris.scheduler.executor.TransientTaskExecutor;
 import org.apache.doris.thrift.TUniqueId;
 
 import com.google.common.collect.Lists;
-import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
 
 import java.util.List;
@@ -56,7 +55,6 @@ public class ExportTaskExecutor implements TransientTaskExecutor {
 
     ExportJob exportJob;
 
-    @Setter
     Long taskId;
 
     private StmtExecutor stmtExecutor;
@@ -205,4 +203,8 @@ public class ExportTaskExecutor implements TransientTaskExecutor {
         }
         return Optional.empty();
     }
+
+    public void setTaskId(Long taskId) {
+        this.taskId = taskId;
+    }
 }

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/commands/ExportCommand.java

@@ -88,6 +88,7 @@ public class ExportCommand extends Command implements ForwardWithSync {
             .add(PropertyAnalyzer.PROPERTIES_LINE_DELIMITER)
             .add(PropertyAnalyzer.PROPERTIES_TIMEOUT)
             .add("format")
+            .add(OutFileClause.PROP_WITH_BOM)
             .build();
 
     private final List<String> nameParts;
@@ -267,6 +268,9 @@ public class ExportCommand extends Command implements ForwardWithSync {
         exportJob.setFormat(fileProperties.getOrDefault(LoadStmt.KEY_IN_PARAM_FORMAT_TYPE, "csv")
                 .toLowerCase());
 
+        // set withBom
+        exportJob.setWithBom(fileProperties.getOrDefault(OutFileClause.PROP_WITH_BOM, "false"));
+
         // set parallelism
         int parallelism;
         try {