Migrate org.eclipse.ui.tests.navigator 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

 2 937 files  +  468   2 937 suites  +468   2h 13m 59s ⏱️ + 47m 41s
 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 463d472. ± Comparison against base commit 1fa29c8.

This pull request removes 132 and adds 132 tests. Note that renamed tests count towards both.

org.eclipse.ui.tests.navigator.ActionProviderTest ‑ testAppearsBefore
org.eclipse.ui.tests.navigator.ActionProviderTest ‑ testBasicModel
org.eclipse.ui.tests.navigator.ActionProviderTest ‑ testOverride
org.eclipse.ui.tests.navigator.ActivityTest ‑ testCategoryWizard
org.eclipse.ui.tests.navigator.ActivityTest ‑ testProviderFilter
org.eclipse.ui.tests.navigator.EvaluationCacheTest ‑ testNotSameInstEqualNotOverrides
org.eclipse.ui.tests.navigator.EvaluationCacheTest ‑ testNotSameInstEqualOverrides
org.eclipse.ui.tests.navigator.EvaluationCacheTest ‑ testOnVisibilityOrActivationChangeClearsCaches
org.eclipse.ui.tests.navigator.EvaluationCacheTest ‑ testReplaceNotOverrides
org.eclipse.ui.tests.navigator.EvaluationCacheTest ‑ testReplaceOverrides
…

NavigatorTestSuite ActionProviderTest ‑ testAppearsBefore
NavigatorTestSuite ActionProviderTest ‑ testBasicModel
NavigatorTestSuite ActionProviderTest ‑ testOverride
NavigatorTestSuite ActivityTest ‑ testCategoryWizard
NavigatorTestSuite ActivityTest ‑ testProviderFilter
NavigatorTestSuite CdtTest ‑ testCdt1
NavigatorTestSuite EvaluationCacheTest ‑ testNotSameInstEqualNotOverrides
NavigatorTestSuite EvaluationCacheTest ‑ testNotSameInstEqualOverrides
NavigatorTestSuite EvaluationCacheTest ‑ testOnVisibilityOrActivationChangeClearsCaches
NavigatorTestSuite EvaluationCacheTest ‑ testReplaceNotOverrides
…

This pull request removes 2 skipped tests and adds 2 skipped tests. Note that renamed tests count towards both.

org.eclipse.ui.tests.navigator.resources.FoldersAsProjectsContributionTest ‑ alreadyAdded
org.eclipse.ui.tests.navigator.resources.FoldersAsProjectsContributionTest ‑ notYetImported

NavigatorTestSuite FoldersAsProjectsContributionTest ‑ alreadyAdded
NavigatorTestSuite FoldersAsProjectsContributionTest ‑ notYetImported