Migrate org.eclipse.ltk.core.refactoring.tests from JUnit4 to JUnit5

[vogella]

• Convert @RunWith(Suite.class) to @suite
• Convert @Suite.SuiteClasses to @SelectClasses
• Update imports from org.junit.runners to org.junit.platform.suite.api
• Add org.junit.jupiter.api and org.junit.platform.suite.api to Import-Package

[github-actions]

Test Results

 2 934 files  +  465   2 934 suites  +465   2h 11m 33s ⏱️ + 45m 15s
 8 166 tests ±    0   7 921 ✅ ±    0  245 💤 ±  0  0 ❌ ±0 
23 568 runs  +2 457  22 786 ✅ +2 229  782 💤 +228  0 ❌ ±0 

Results for commit 39e821b. ± Comparison against base commit 1fa29c8.

This pull request removes 92 and adds 92 tests. Note that renamed tests count towards both.

AllTests org.eclipse.ltk.core.refactoring.tests.RefactoringContextTest ‑ testDisposeChangeFailed
AllTests org.eclipse.ltk.core.refactoring.tests.RefactoringContextTest ‑ testDisposeFinalFailed
AllTests org.eclipse.ltk.core.refactoring.tests.RefactoringContextTest ‑ testDisposeInitialFailed
AllTests org.eclipse.ltk.core.refactoring.tests.RefactoringContextTest ‑ testDisposeNormal
AllTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistoryTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistorySerializationTests ‑ testReadDescriptor0
AllTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistoryTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistorySerializationTests ‑ testReadDescriptor1
AllTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistoryTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistorySerializationTests ‑ testReadDescriptor10
AllTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistoryTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistorySerializationTests ‑ testReadDescriptor11
AllTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistoryTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistorySerializationTests ‑ testReadDescriptor12
AllTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistoryTests org.eclipse.ltk.core.refactoring.tests.history.RefactoringHistorySerializationTests ‑ testReadDescriptor2
…

AllTests ParticipantTests CancelingParticipantTests ‑ testCheckConditions
AllTests ParticipantTests CancelingParticipantTests ‑ testCreateChange
AllTests ParticipantTests CancelingParticipantTests ‑ testCreatePreChange
AllTests ParticipantTests FailingParticipantTests ‑ testFailingParticipants
AllTests ParticipantTests FailingParticipantTests ‑ testFailingRefactorWithPreParticipants
AllTests ParticipantTests MoveRefactoringWithRefUpdateTest ‑ testMoveRefactoringWithParticipants
AllTests ParticipantTests SharedTextChangeTests ‑ testSharedUpdating
AllTests RefactoringContextTest ‑ testDisposeChangeFailed
AllTests RefactoringContextTest ‑ testDisposeFinalFailed
AllTests RefactoringContextTest ‑ testDisposeInitialFailed
…