Add NeedPostProcess for Parser interface to improve performance of csv render (#15153)

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -831,12 +831,14 @@ Gitea can support Markup using external tools. The example below will add a mark
 ```ini
 [markup.asciidoc]
 ENABLED = true
+NEED_POSTPROCESS = true
 FILE_EXTENSIONS = .adoc,.asciidoc
 RENDER_COMMAND = "asciidoc --out-file=- -"
 IS_INPUT_FILE = false
 ```
 
 - ENABLED: **false** Enable markup support; set to **true** to enable this renderer.
+- NEED\_POSTPROCESS: **true** set to **true** to replace links / sha1 and etc.
 - FILE\_EXTENSIONS: **\<empty\>** List of file extensions that should be rendered by an external
    command. Multiple extentions needs a comma as splitter.
 - RENDER\_COMMAND: External command to render all matching extensions.

docs/content/doc/advanced/config-cheat-sheet.zh-cn.md

@@ -297,12 +297,14 @@ test01.xls: application/vnd.ms-excel; charset=binary
 ```ini
 [markup.asciidoc]
 ENABLED = false
+NEED_POSTPROCESS = true
 FILE_EXTENSIONS = .adoc,.asciidoc
 RENDER_COMMAND = "asciidoc --out-file=- -"
 IS_INPUT_FILE = false
 ```
 
 - ENABLED: 是否启用，默认为false。
+- NEED\_POSTPROCESS: **true** 设置为 true 则会替换渲染文件中的内部链接和Commit ID 等。
 - FILE_EXTENSIONS: 关联的文档的扩展名，多个扩展名用都好分隔。
 - RENDER_COMMAND: 工具的命令行命令及参数。
 - IS_INPUT_FILE: 输入方式是最后一个参数为文件路径还是从标准输入读取。