Convert org.eclipse.cdt.core.tests.BaseTestFramework to JUnit5

[jonahgraham]

BaseTestFramework is the base class for a hierarchy of tests and all those test updates are included in this commit.

Includes a parent commit that deletes an unused method that interfered with the resolution of assertEquals when statically imported.

Part of #1380

[github-actions]

Test Results

  584 files   -   1    584 suites   - 1   13m 8s ⏱️ -38s
9 444 tests  - 473  9 420 ✅  - 473  24 💤 ±0  0 ❌ ±0 
9 471 runs   - 484  9 447 ✅  - 484  24 💤 ±0  0 ❌ ±0 

Results for commit 9d78040. ± Comparison against base commit 6574af3.

This pull request removes 595 and adds 122 tests. Note that renamed tests count towards both.

CommentHandlingTest ClassCommentTest ‑ Unknown test
CommentHandlingTest CommentHandlingTest 1 - von CERP ‑ Unknown test
CommentHandlingTest CommentHandlingTest 2 - von CERP ‑ Unknown test
CommentHandlingTest CommentHandlingTest 3 - von CERP ‑ Unknown test
CommentHandlingTest CommentHandlingTest 4 - von CERP ‑ Unknown test
CommentHandlingTest CommentRecognition Bug 233438 ‑ Unknown test
CommentHandlingTest CommentRecognition Bug 234786 ‑ Unknown test
CommentHandlingTest CommentRecognition comment in empty compound statement width include guard ‑ Unknown test
CommentHandlingTest CommentRecognition preprocessor directives comment recognition ‑ Unknown test
CommentHandlingTest CommentRecognition0 ‑ Unknown test
…

org.eclipse.cdt.core.parser.tests.rewrite.comenthandler.CommentHandlingTest ‑ test(List)[100] CommentRecognition205 - von ASTWriter IfStatement
org.eclipse.cdt.core.parser.tests.rewrite.comenthandler.CommentHandlingTest ‑ test(List)[101] CommentRecognition206 - von ASTWriter SwitchStatement
org.eclipse.cdt.core.parser.tests.rewrite.comenthandler.CommentHandlingTest ‑ test(List)[102] CommentRecognition207 - von ASTWriter WhileStatement
org.eclipse.cdt.core.parser.tests.rewrite.comenthandler.CommentHandlingTest ‑ test(List)[103] CommentRecognition208 - von ASTWriter ExplicitTemplateInstantiationStatement
org.eclipse.cdt.core.parser.tests.rewrite.comenthandler.CommentHandlingTest ‑ test(List)[104] CommentRecognition209 - von ASTWriter GPPExplicitTemplateInstantitation
org.eclipse.cdt.core.parser.tests.rewrite.comenthandler.CommentHandlingTest ‑ test(List)[105] CommentRecognition210 - von ASTWriter LinkageSpecification
org.eclipse.cdt.core.parser.tests.rewrite.comenthandler.CommentHandlingTest ‑ test(List)[106] CommentRecognition212 - von ASTWriter TemplateFunction
org.eclipse.cdt.core.parser.tests.rewrite.comenthandler.CommentHandlingTest ‑ test(List)[107] CommentRecognition213 - von ASTWriter DeclarationWithTraillingDoubleComments
org.eclipse.cdt.core.parser.tests.rewrite.comenthandler.CommentHandlingTest ‑ test(List)[108] CommentRecognition214 - von ASTWriter NamesapceDefinition
org.eclipse.cdt.core.parser.tests.rewrite.comenthandler.CommentHandlingTest ‑ test(List)[109] CommentRecognition215 - von ASTWriter NamesapceDefinition
…

♻️ This comment has been updated with latest results.

[jonahgraham]

ExpressionWriterTest was being run twice before this commit because it was discovered on its own and added to another suite here:

cdt/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/rewrite/astwriter/SourceRewriteTest.java

Line 90 in a8b3401

suite.addTestSuite(ExpressionWriterTest.class);

This accounts for 11 of the reduced runs