Make Java compatibility tests not depend on java-tck JAR

[greg-at-moderne]

What's changed?

Changing the internal Gradle configuration of Java compatibility tests.
Namely, the various Java version tests (8, 11, 17, 21, 25) when depending on java-tck, now they depend on the class files of that module, not a jar. JAR is not deterministic and prevents Gradle caching (unless some tricks are applied there).

What's your motivation?

Speed up CI in this project. These Java compatibility tests have no need to run in every single PR. They are bound to give the same output if nothing changed in the chain.

[timtebeek]

Nice work!

[timtebeek]

Similarly I see this PR still triggered these two tasks; was that expected & necessary?

> Task :rewrite-python:pythonUpgradePip
Custom actions are attached to task ':rewrite-python:pythonUpgradePip'.
Caching disabled for task ':rewrite-python:pythonUpgradePip' because:
  Gradle would require more information to cache this task
Task ':rewrite-python:pythonUpgradePip' is not up-to-date because:
  Task has not declared any outputs despite executing actions.
Upgrading pip in virtual environment
Starting process 'command '/home/runner/work/rewrite/rewrite/rewrite-python/rewrite/.venv/bin/python''. Working directory: /home/runner/work/rewrite/rewrite/rewrite-python/rewrite Command: /home/runner/work/rewrite/rewrite/rewrite-python/rewrite/.venv/bin/python -m pip install --upgrade pip
Successfully started process 'command '/home/runner/work/rewrite/rewrite/rewrite-python/rewrite/.venv/bin/python''
Requirement already satisfied: pip in ./.venv/lib/python3.12/site-packages (24.0)
Collecting pip
  Downloading pip-26.1-py3-none-any.whl.metadata (4.6 kB)
Downloading pip-26.1-py3-none-any.whl (1.8 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.8/1.8 MB 37.1 MB/s eta 0:00:00
Installing collected packages: pip
  Attempting uninstall: pip
    Found existing installation: pip 24.0
    Uninstalling pip-24.0:
      Successfully uninstalled pip-24.0
Successfully installed pip-26.1
Resolve mutations for :rewrite-python:pythonInstall (Thread[#160,Execution worker,5,main]) started.
:rewrite-python:pythonInstall (Thread[#160,Execution worker,5,main]) started.

> Task :rewrite-python:pythonInstall
Custom actions are attached to task ':rewrite-python:pythonInstall'.
Caching disabled for task ':rewrite-python:pythonInstall' because:
  Gradle would require more information to cache this task
Task ':rewrite-python:pythonInstall' is not up-to-date because:
  Task has not declared any outputs despite executing actions.
Installing Python package with pip
Starting process 'command '/home/runner/work/rewrite/rewrite/rewrite-python/rewrite/.venv/bin/pip''. Working directory: /home/runner/work/rewrite/rewrite/rewrite-python/rewrite Command: /home/runner/work/rewrite/rewrite/rewrite-python/rewrite/.venv/bin/pip install -e .[dev]
Successfully started process 'command '/home/runner/work/rewrite/rewrite/rewrite-python/rewrite/.venv/bin/pip''
Obtaining file:///home/runner/work/rewrite/rewrite/rewrite-python/rewrite

[greg-at-moderne]

No it wasn't. That's another problem of the same kind.