Upgrade to Gradle 9.0.0 (#7657)

#### What type of PR is this?

/kind cleanup
/area core
/milestone 2.21.x

#### What this PR does / why we need it:

See https://docs.gradle.org/9.0.0/release-notes.html and https://github.com/gradle/gradle/releases/tag/v9.0.0 for more.

#### Does this PR introduce a user-facing change?

```release-note
升级 Gradle 至 9.0.0
```

gradle/libs.versions.toml

@@ -41,7 +41,7 @@ therapi = ['therapi-runtime-javadoc', 'therapi-runtime-javadoc-scribe']
 [plugins]
 spring-boot = 'org.springframework.boot:3.5.4'
 spring-dependency-management = 'io.spring.dependency-management:1.1.7'
-git-properties = 'com.gorylenko.gradle-git-properties:2.5.0'
+git-properties = 'com.gorylenko.gradle-git-properties:2.5.2'
 undercouch-download = 'de.undercouch.download:5.6.0'
 lombok = 'io.freefair.lombok:8.14'
 checksum = 'org.gradle.crypto.checksum:1.4.0'

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.