CI: detect Gradle version and use setup-gradle action for release

[Idddd]

Motivation

• Ensure the workflow uses the project-specified Gradle version when installing Gradle in the runner so release tasks run with the expected Gradle runtime.

Description

• Add a Read Gradle version step that parses gradle/wrapper/gradle-wrapper.properties to extract the Gradle version and exposes it as an output.
• Pass the parsed version to gradle/actions/setup-gradle@v4 via the gradle-version input to install the matching Gradle distribution.
• Replace invocation of ./gradlew release with gradle release so the action-provided Gradle binary is used, and emit an error if the wrapper file cannot be parsed.

Testing

• No automated tests were run as part of this change.

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Codex Task