Use Java 21 in Github actions

[laeubi]

Platorm requires Java 21 now on some places so we should be prepared.

[github-actions]

Test Results

  663 files  ±  0    663 suites  ±0   1h 16m 3s ⏱️ + 1m 23s
2 163 tests  -  48  2 114 ✅  -  50   49 💤 +2  0 ❌ ±0 
6 633 runs   - 144  6 484 ✅  - 150  149 💤 +6  0 ❌ ±0 

Results for commit adecdd8. ± Comparison against base commit 2ae64f5.

This pull request removes 48 tests.

AutomatedTests org.eclipse.osgi.tests.securityadmin.AllSecurityAdminTests org.eclipse.osgi.tests.securityadmin.SecurityAdminUnitTests ‑ testAccessControlContext01
AutomatedTests org.eclipse.osgi.tests.securityadmin.AllSecurityAdminTests org.eclipse.osgi.tests.securityadmin.SecurityAdminUnitTests ‑ testAccessControlContext01a
AutomatedTests org.eclipse.osgi.tests.securityadmin.AllSecurityAdminTests org.eclipse.osgi.tests.securityadmin.SecurityAdminUnitTests ‑ testAccessControlContext02
AutomatedTests org.eclipse.osgi.tests.securityadmin.AllSecurityAdminTests org.eclipse.osgi.tests.securityadmin.SecurityAdminUnitTests ‑ testAccessControlContext03
AutomatedTests org.eclipse.osgi.tests.securityadmin.AllSecurityAdminTests org.eclipse.osgi.tests.securityadmin.SecurityAdminUnitTests ‑ testAccessControlContext04
AutomatedTests org.eclipse.osgi.tests.securityadmin.AllSecurityAdminTests org.eclipse.osgi.tests.securityadmin.SecurityAdminUnitTests ‑ testAccessControlContext05
AutomatedTests org.eclipse.osgi.tests.securityadmin.AllSecurityAdminTests org.eclipse.osgi.tests.securityadmin.SecurityAdminUnitTests ‑ testAccessControlContext06
AutomatedTests org.eclipse.osgi.tests.securityadmin.AllSecurityAdminTests org.eclipse.osgi.tests.securityadmin.SecurityAdminUnitTests ‑ testAccessControlContext07
AutomatedTests org.eclipse.osgi.tests.securityadmin.AllSecurityAdminTests org.eclipse.osgi.tests.securityadmin.SecurityAdminUnitTests ‑ testBug286307
AutomatedTests org.eclipse.osgi.tests.securityadmin.AllSecurityAdminTests org.eclipse.osgi.tests.securityadmin.SecurityAdminUnitTests ‑ testCreateDomain
…

This pull request skips 2 tests.

AutomatedTests org.eclipse.osgi.tests.bundles.BundleTests org.eclipse.osgi.tests.bundles.EquinoxBundleAdaptTests ‑ testAdapt_ProtectionDomain
AutomatedTests org.eclipse.osgi.tests.bundles.BundleTests org.eclipse.osgi.tests.bundles.SystemBundleTests ‑ testDynamicSecurityManager

[laeubi]

This now fails to execute (or more formally skip) test that require a security manager, the ConfigAdmin text seem to not run at all anymore.