Replace Plugin.getLog() with static ILog.of(Class)

[vogella]

Summary

• Switch six single-call-site static log(IStatus) helpers to ILog.of(SomeClass.class) instead of routing through the plugin singleton.
• Removes the last logging-only reason these bundles rely on getDefault() / getPlugin(), and logging now works even before the activator has stored the singleton.
• No MANIFEST changes required — all affected bundles already require org.eclipse.core.runtime >= 3.29, which is when ILog.of(Class) was introduced.

Affected bundles:

• org.eclipse.compare.win32
• org.eclipse.unittest.ui
• org.eclipse.ui.console
• org.eclipse.core.variables
• org.eclipse.ant.core
• org.eclipse.ant.ui

Part of an effort to identify activators / getDefault() usages that can be simplified or replaced. These six are the lowest-risk starting point — each bundle has exactly one getDefault().getLog() call site.

Test plan

• CI build succeeds
• No API baseline warnings for the six bundles
• Logging still functions (spot-check: trigger a logged error in one of the affected plug-ins)

[vogella]

Build failure also looks unrelated to this change:

Error: Failed to execute goal org.eclipse.tycho:tycho-surefire-plugin:5.0.3-SNAPSHOT:test (default-test) on project org.eclipse.core.tests.resources.saveparticipant1: No tests found -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.eclipse.tycho:tycho-surefire-plugin:5.0.3-SNAPSHOT:test (default-test) on project org.eclipse.core.tests.resources.saveparticipant1: No tests found
at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:333)
at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:316)

Again I would guess that eclipse-platform/eclipse.platform.releng.aggregator#3784 might be related.

[github-actions]

Test Results

   34 files   -    17     34 suites   - 17   22m 1s ⏱️ - 15m 5s
4 555 tests ±    0  4 508 ✅  -    21   47 💤 +25  0 ❌  - 4 
8 174 runs   - 4 087  8 067 ✅  - 4 034  107 💤  - 49  0 ❌  - 4 

Results for commit d9f0d77. ± Comparison against base commit 9e8a07f.

This pull request skips 25 tests.

org.eclipse.core.tests.filesystem.SymlinkTest ‑ testSymlinkPutHidden
org.eclipse.core.tests.internal.alias.BasicAliasTest ‑ testBug198571
org.eclipse.core.tests.internal.localstore.MoveTest ‑ testMoveFileAcrossVolumes
org.eclipse.core.tests.internal.localstore.MoveTest ‑ testMoveFolderAcrossVolumes
org.eclipse.core.tests.resources.IProjectTest ‑ testProjectCreationLocationExistsWithDifferentCase
org.eclipse.core.tests.resources.IWorkspaceRootTest ‑ testFindFilesNonCanonicalPath
org.eclipse.core.tests.resources.LinkedResourceTest ‑ testFindFilesForLocationCaseVariant
org.eclipse.core.tests.resources.LinkedResourceWithPathVariableTest ‑ testFindFilesForLocationCaseVariant
org.eclipse.core.tests.resources.ResourceAttributeTest ‑ testAttributeArchive
org.eclipse.core.tests.resources.ResourceAttributeTest ‑ testAttributeHidden
…