Java: Use fixture for filtering diagnostics

[jketema]

No description provided.

[Copilot]

Pull request overview

This PR updates Java buildless integration tests to opt into a shared diagnostics-filtering/checking mechanism by requesting the check_diagnostics_java pytest fixture in each test function signature.

Changes:

• Add check_diagnostics_java fixture dependency to buildless-related Java integration tests.
• Standardize buildless test entrypoints to ensure diagnostics are filtered/validated consistently during test execution.

Show a summary per file

File	Description
java/ql/integration-tests/java/buildless/test.py	Adds check_diagnostics_java fixture to the buildless smoke test.
java/ql/integration-tests/java/buildless-sibling-projects/test.py	Adds check_diagnostics_java fixture to sibling-projects buildless test.
java/ql/integration-tests/java/buildless-proxy-maven/test.py	Adds check_diagnostics_java fixture to buildless Maven-over-proxy test.
java/ql/integration-tests/java/buildless-proxy-gradle/test.py	Adds check_diagnostics_java fixture to buildless Gradle-over-proxy test.
java/ql/integration-tests/java/buildless-maven/test.py	Adds check_diagnostics_java fixture to buildless Maven test (build_mode none).
java/ql/integration-tests/java/buildless-maven-timeout/test.py	Adds check_diagnostics_java fixture to buildless Maven timeout test.
java/ql/integration-tests/java/buildless-maven-multimodule/test.py	Adds check_diagnostics_java fixture to buildless Maven multimodule test.
java/ql/integration-tests/java/buildless-maven-mirrorof/test.py	Adds check_diagnostics_java fixture to buildless Maven mirrorOf test (build_mode none).
java/ql/integration-tests/java/buildless-maven-existing-settings-xml/test.py	Adds check_diagnostics_java fixture to buildless Maven existing-settings.xml test (build_mode none).
java/ql/integration-tests/java/buildless-maven-executable-war/test.py	Adds check_diagnostics_java fixture to buildless Maven executable WAR test.
java/ql/integration-tests/java/buildless-inherit-trust-store/test.py	Adds check_diagnostics_java fixture to trust-store inheritance test.
java/ql/integration-tests/java/buildless-gradle/test.py	Adds check_diagnostics_java fixture to buildless Gradle test.
java/ql/integration-tests/java/buildless-gradle-timeout/test.py	Adds check_diagnostics_java fixture to buildless Gradle timeout test.
java/ql/integration-tests/java/buildless-gradle-classifiers/test.py	Adds check_diagnostics_java fixture to buildless Gradle classifiers test.
java/ql/integration-tests/java/buildless-gradle-boms/test.py	Adds check_diagnostics_java fixture to buildless Gradle BOMs test.
java/ql/integration-tests/java/buildless-erroneous/test.py	Adds check_diagnostics_java fixture to buildless erroneous-project test.

Copilot's findings

• Files reviewed: 16/16 changed files
• Comments generated: 0