merge 6.0.0 into 6.0.0

SCA开源扫描整改

Created-by: lin-qiang123
Commit-by: lin-qiang123
Merged-by: opengauss_bot
Description: 【标题】(请简要描述下实现的内容)

【实现内容】:
开源扫描整改
【根因分析】:
开源扫描不合规
【实现方案】:
添加开源文件的copyright和lincense信息
【关联需求或issue】:
https://gitcode.com/opengauss/openGauss-server/issues/7321
【开发自验报告】:
1. 请附上自验结果(内容或者截图)
![image.png](https://raw.gitcode.com/user-images/assets/5089689/dfab8032-753c-433c-94c3-5f39e2f0687d/image.png 'image.png')
2. 是否可以添加fastcheck测试用例，如是，请补充fastcheck用例
3. 是否涉及资料修改，如是，在docs仓库补充资料
4. 是否考虑升级场景(系统表修改、日志持久化以及修改执行态数据格式)
5. 是否考虑在线扩容等扩展场景
6. 是否考虑异常场景/并发场景/前向兼容/性能场景
7. 是否对其他模块产生影响
8. 是否需要回合补丁版本(5.0、6.0)，涉及(**结果错误|coredump|性能劣化|内存泄露|集群异常**)相关修复请排查回合补丁分支

【其他说明】:

See merge request: opengauss/openGauss-server!8061

src/common/backend/utils/adt/f2s.cpp

@@ -1,24 +1,36 @@
-/*
- * Copyright (c) 2024 Huawei Technologies Co.,Ltd.
+/*---------------------------------------------------------------------------
  *
- * openGauss is licensed under Mulan PSL v2.
- * You can use this software according to the terms and conditions of the Mulan PSL v2.
- * You may obtain a copy of Mulan PSL v2 at:
+ * Ryu floating-point output for single precision.
  *
- *          http://license.coscl.org.cn/MulanPSL2
- *
- * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
- * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
- * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
- * See the Mulan PSL v2 for more details.
- * -------------------------------------------------------------------------
- *
- * f2s.cpp
+ * Portions Copyright (c) 2024, openGauss Contributors
+ * Portions Copyright (c) 2018-2019, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *        src/common/backend/utils/adt/f2s.cpp
+ *	  src/common/backend/utils/adt/f2s.cpp
  *
- * -------------------------------------------------------------------------
+ * This is a modification of code taken from github.com/ulfjack/ryu under the
+ * terms of the Boost license (not the Apache license). The original copyright
+ * notice follows:
+ *
+ * Copyright 2018 Ulf Adams
+ *
+ * The contents of this file may be used under the terms of the Apache
+ * License, Version 2.0.
+ *
+ *     (See accompanying file LICENSE-Apache or copy at
+ *      http://www.apache.org/licenses/LICENSE-2.0)
+ *
+ * Alternatively, the contents of this file may be used under the terms of the
+ * Boost Software License, Version 1.0.
+ *
+ *     (See accompanying file LICENSE-Boost or copy at
+ *      https://www.boost.org/LICENSE_1_0.txt)
+ *
+ * Unless required by applicable law or agreed to in writing, this software is
+ * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.
+ *
+ *---------------------------------------------------------------------------
  */
 
 #ifndef FRONTEND