[FLINK-34893] Bump checkstyle to 9.3

Author: snuyanzin

docs/content.zh/docs/flinkDev/ide_setup.md

@@ -103,7 +103,7 @@ IntelliJ 使用 Checkstyle-IDEA 插件在 IDE 中支持 checkstyle。
 1. 从 IntelliJ 插件存储库中安装 "Checkstyle-IDEA" 插件。
 2. 通过 Settings → Tools → Checkstyle 配置插件。
 3. 将 "Scan Scope" 设置为仅 Java 源（包括测试）。
-4. 在 "Checkstyle Version" 下拉菜单中选择 _8.14_ 版本，然后单击 "apply"。**此步骤很重要，请勿跳过！**
+4. 在 "Checkstyle Version" 下拉菜单中选择 _9.3_ 版本，然后单击 "apply"。**此步骤很重要，请勿跳过！**
 5. 在 "Configuration File" 窗格中，点击 "+" 图标添加新配置：
     1. 将 "Description" 设置为 Flink。
     2. 选择 "Use a local Checkstyle file" ，然后将其指向你存储库中 `"tools/maven/checkstyle.xml"` 文件。

docs/content/docs/flinkDev/ide_setup.md

@@ -169,7 +169,7 @@ any of these modules.
 
 1. Go to "Settings" → "Tools" → "Checkstyle".
 2. Set "Scan Scope" to "Only Java sources (including tests)".
-3. For "Checkstyle Version" select "8.14".
+3. For "Checkstyle Version" select "9.3".
 4. Under "Configuration File" click the "+" icon to add a new configuration.
 5. Set "Description" to "Flink".
 6. Select "Use a local Checkstyle file" and point it to `tools/maven/checkstyle.xml` located within

pom.xml

@@ -175,7 +175,7 @@ under the License.
 		<orc.version>1.5.6</orc.version>
 		<japicmp.referenceVersion>1.18.0</japicmp.referenceVersion>
 		<japicmp.outputDir>tools/japicmp-output</japicmp.outputDir>
-		<checkstyle.version>8.14</checkstyle.version>
+		<checkstyle.version>9.3</checkstyle.version>
 		<!-- can be removed with maven-spotless-plugin:2.38+ -->
 		<spotless.skip>false</spotless.skip>
 		<spotless.version>2.27.1</spotless.version>
@@ -2170,7 +2170,7 @@ under the License.
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-checkstyle-plugin</artifactId>
-					<version>3.1.2</version>
+					<version>3.3.1</version>
 					<dependencies>
 						<dependency>
 							<groupId>com.puppycrawl.tools</groupId>

tools/maven/checkstyle.xml

@@ -208,7 +208,7 @@ This file is based on the checkstyle file of Apache Beam.
 
 		<module name="RedundantModifier">
 			<!-- Checks for redundant modifiers on various symbol definitions.
-			  See: http://checkstyle.sourceforge.net/config_modifier.html#RedundantModifier
+			  See: https://checkstyle.sourceforge.io/checks/modifier/redundantmodifier.html#RedundantModifier
 
 			  We exclude METHOD_DEF to allow final methods in final classes to make them more future-proof.
 			-->
@@ -236,18 +236,12 @@ This file is based on the checkstyle file of Apache Beam.
 		-->
 
 		<!-- Checks for Javadoc comments.                     -->
-		<!-- See http://checkstyle.sf.net/config_javadoc.html -->
+		<!-- See https://checkstyle.sourceforge.io/checks/javadoc/javadocmethod.html -->
 		<module name="JavadocMethod">
-			<property name="scope" value="protected"/>
+			<property name="accessModifiers" value="protected"/>
 			<property name="severity" value="error"/>
-			<property name="allowMissingJavadoc" value="true"/>
 			<property name="allowMissingParamTags" value="true"/>
 			<property name="allowMissingReturnTag" value="true"/>
-			<property name="allowMissingThrowsTags" value="true"/>
-			<property name="allowThrowsTagsForSubclasses" value="true"/>
-			<property name="allowUndeclaredRTE" value="true"/>
-			<!-- This check sometimes failed for with "Unable to get class information for @throws tag" for custom exceptions -->
-			<property name="suppressLoadErrors" value="true"/>
 		</module>
 
 		<!-- Check that paragraph tags are used correctly in Javadoc. -->