Migrate performance session tests to JUnit 5 #903

[HeikoKlare]

The PerformanceSessionTestSuite and it's derived class and consumers still rely on JUnit 3 functionality. This change migrates the remaining performance session tests to the JUnit 5 SessionTestExecution. The SessionTestExecution is slightly extended to support the execution of repeated performance tests.
The change also disentangles currently mixed up performance tests and makes each of them executable standalone.

Contributes to #903

[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.runtime/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 017f8a8de0b3cc372d4cba5cb0967b54668bda9c Mon Sep 17 00:00:00 2001
From: Eclipse Platform Bot <platform-bot@eclipse.org>
Date: Tue, 30 Dec 2025 11:12:21 +0000
Subject: [PATCH] Version bump(s) for 4.39 stream


diff --git a/runtime/tests/org.eclipse.core.tests.runtime/META-INF/MANIFEST.MF b/runtime/tests/org.eclipse.core.tests.runtime/META-INF/MANIFEST.MF
index 2487c0c862..cac1f2b6c4 100644
--- a/runtime/tests/org.eclipse.core.tests.runtime/META-INF/MANIFEST.MF
+++ b/runtime/tests/org.eclipse.core.tests.runtime/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: Eclipse Core Tests Runtime
 Bundle-SymbolicName: org.eclipse.core.tests.runtime; singleton:=true
-Bundle-Version: 3.21.800.qualifier
+Bundle-Version: 3.21.900.qualifier
 Bundle-Activator: org.eclipse.core.tests.runtime.RuntimeTestsPlugin
 Bundle-Vendor: Eclipse.org
 Export-Package: org.eclipse.core.tests.internal.preferences,
-- 
2.52.0

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

[github-actions]

Test Results

 1 953 files  ±0   1 953 suites  ±0   1h 24m 28s ⏱️ +30s
 4 745 tests ±0   4 721 ✅ ±0   24 💤 ±0  0 ❌ ±0 
14 235 runs  ±0  14 053 ✅ ±0  182 💤 ±0  0 ❌ ±0 

Results for commit f675ae7. ± Comparison against base commit 3b0c3f3.

♻️ This comment has been updated with latest results.