Resolve CI action warnings

[HonzaR]

Is your feature request related to a problem? Please describe.

We'd like to check and resolve all the CI action warnings reported in the Actions tab.

Describe the solution you'd like

Go through different action outputs and see their warnings.

There are, e.g.:

• Deprecation warnings
  This job uses deprecated functionality from the gradle/gradle-build-action action. Follow the links for upgrade details.
  The action gradle/gradle-build-action has been replaced by gradle/actions/setup-gradle
• validate_gradle_wrapper
  This job uses deprecated functionality from the 'gradle/wrapper-validation-action' action. Consult the logs for more details.
• build_and_deploy
  This job uses deprecated functionality from the 'gradle/gradle-build-action' action. Consult the Job Summary for more details.