[branch-2.1] pick some prs (#39860)

## Proposed changes

Issue Number: close #xxx

https://github.com/apache/doris/pull/38385 optimize parsing datetime
https://github.com/apache/doris/pull/38978 make stream load failure
message more clear and disable some error's stacktrace by default
https://github.com/apache/doris/pull/39255 fix random function coredump
https://github.com/apache/doris/pull/39324 fix function corr
inconsistency with doc
https://github.com/apache/doris/pull/39449 check auto partitoin nullity
when creating partition
https://github.com/apache/doris/pull/39695 make
DynamicPartitionScheduler immediately know interval's change
https://github.com/apache/doris/pull/39754 Add some partition expr check
on creating table

fe/fe-common/src/main/java/org/apache/doris/common/ConfigBase.java

@@ -123,6 +123,10 @@ public class ConfigBase {
         }
     }
 
+    public static Field getField(String name) {
+        return confFields.get(name);
+    }
+
     public void initCustom(String customConfFile) throws Exception {
         this.customConfFile = customConfFile;
         File file = new File(customConfFile);