Simplify SymLink creation in eclipse.core.tests

[HannesWell]

As discussed in #755 (comment).

[github-actions]

Test Results

 1 896 files   -  81   1 896 suites   - 81   1h 35m 53s ⏱️ -23s
 4 590 tests  - 153   4 559 ✅  - 160   24 💤 ±0   7 ❌ + 7 
13 770 runs   - 459  13 571 ✅  - 476  182 💤 ±0  17 ❌ +17 

For more details on these failures, see this check.

Results for commit 465b3d5. ± Comparison against base commit 74f91b3.

This pull request removes 153 tests.

AllCompareTests AsyncExecTests ‑ testCancelOnRequeue
AllCompareTests AsyncExecTests ‑ testQueueAdd
AllCompareTests AsyncExecTests ‑ testWorker
AllCompareTests CompareFileRevisionEditorInputTest ‑ testPrepareCompareInputWithNonLocalResourceTypedElements
AllCompareTests CompareUIPluginTest ‑ testFindContentViewerDescriptorForTextType_StreamAccessor
AllCompareTests CompareUIPluginTest ‑ testFindContentViewerDescriptor_TextType_NotStreamAccessor
AllCompareTests CompareUIPluginTest ‑ testFindContentViewerDescriptor_UnknownType
AllCompareTests ContentMergeViewerTest ‑ testFFFX
AllCompareTests ContentMergeViewerTest ‑ testFFTX
AllCompareTests ContentMergeViewerTest ‑ testFFXF
…

♻️ This comment has been updated with latest results.

[eclipse-platform-bot]

This pull request changes some projects for the first time in this development cycle.
Therefore the following files need a version increment:

runtime/tests/org.eclipse.core.tests.harness/META-INF/MANIFEST.MF

An additional commit containing all the necessary changes was pushed to the top of this PR's branch. To obtain these changes (for example if you want to push more changes) either fetch from your fork or apply the git patch.

Git patch

From fbba2c77376396ea967445cb2a7dddb4326d396d Mon Sep 17 00:00:00 2001
From: Eclipse Platform Bot <platform-bot@eclipse.org>
Date: Fri, 6 Jun 2025 08:59:56 +0000
Subject: [PATCH] Version bump(s) for 4.37 stream


diff --git a/runtime/tests/org.eclipse.core.tests.harness/META-INF/MANIFEST.MF b/runtime/tests/org.eclipse.core.tests.harness/META-INF/MANIFEST.MF
index 960ca86689..73c195feab 100644
--- a/runtime/tests/org.eclipse.core.tests.harness/META-INF/MANIFEST.MF
+++ b/runtime/tests/org.eclipse.core.tests.harness/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: Eclipse Core Tests Harness
 Bundle-SymbolicName: org.eclipse.core.tests.harness;singleton:=true
-Bundle-Version: 3.17.200.qualifier
+Bundle-Version: 3.17.300.qualifier
 Bundle-Vendor: Eclipse.org
 Export-Package: org.eclipse.core.tests.harness;version="2.0",
  org.eclipse.core.tests.harness.session,
-- 
2.49.0

Further information are available in Common Build Issues - Missing version increments.

[vogella]

@HannesWell I did the update of your PR, I hope that is ok. Your change looked just to good to be lost.

[HannesWell]

I did the update of your PR, I hope that is ok. Your change looked just to good to be lost.

Yes, of course. Thank you for updating it.

Unfortunately there are (still) failing tests with this and I didn't had the time to investigate the reasons (which is why this staled).
If you can have a look, any help is appreciated.