classpathentry should respect pom resource excludes/includes

[qxo]

so we build project on eclipse without org.eclipse.m2e.core.maven2Builder

[github-actions]

Test Results

  214 files  ±0    214 suites  ±0   15m 53s ⏱️ - 6m 7s
  665 tests ±0    653 ✅  - 2  10 💤 ±0  2 ❌ +2 
1 330 runs  ±0  1 304 ✅  - 4  22 💤 ±0  4 ❌ +4 

For more details on these failures, see this check.

Results for commit 55afb02. ± Comparison against base commit 369b34f.

♻️ This comment has been updated with latest results.

[HannesWell]

Hello @qxo, thank you for providing this PR.
In general this change looks reasonable, but we have to work through a few things until it can be considered for submission.

First of all, you have to sign the Eclipse Contributor Agreement, otherwise we are not allowed to accept your change.

Second please add a test-case to org.eclipse.m2e.jdt.tests in order to demonstrate the missing feature and to ensure it will continue to work in the future.

About the change itself, please see the remarks below.