Upgrade Gradle to v8.3

[lihenggui]

Gradle v8.3 release note: https://docs.gradle.org/8.3/release-notes.html

Elimination of deprecated usage Project.getBuildDir():
gradle/gradle#20210
https://docs.gradle.org/8.3/userguide/upgrading_version_8.html#project_builddir

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[SimonMarquis]

@lihenggui Can you also make sure the corresponding Gradle wrapper JAR is updated.
The expected sha256 is 0336f591bc0ec9aa0c9988929b93ecc916b3c1d52aed202c7381db144aa0ef15 according to https://gradle.org/release-checksums/

You can run this command again to force downloading the latest wrappers:

./gradlew wrapper

[lihenggui]

@lihenggui Can you also make sure the corresponding Gradle wrapper JAR is updated. The expected sha256 is 0336f591bc0ec9aa0c9988929b93ecc916b3c1d52aed202c7381db144aa0ef15 according to https://gradle.org/release-checksums/

You can run this command again to force downloading the latest wrappers:

./gradlew wrapper

Checked and updated
9cc27bf

[lihenggui]

@alexvanyo @dturner @tunjid Ping

[dturner]

Thanks for doing this.