Migrate org.eclipse.jface.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

 2 976 files  +  507   2 976 suites  +507   2h 24m 8s ⏱️ + 57m 50s
 8 206 tests +   40   7 961 ✅ +   40  245 💤 ±  0  0 ❌ ±0 
23 568 runs  +2 457  22 786 ✅ +2 229  782 💤 +228  0 ❌ ±0 

Results for commit bada279. ± Comparison against base commit 1fa29c8.

This pull request removes 1258 and adds 1298 tests. Note that renamed tests count towards both.

org.eclipse.jface.tests.action.ContributionItemTest ‑ testForceModeText
org.eclipse.jface.tests.action.ContributionItemTest ‑ testParentLink
org.eclipse.jface.tests.action.CoolBarManagerTest ‑ testResetItemOrderBug293433
org.eclipse.jface.tests.action.MenuManagerTest ‑ testAddingConcreteItemToMenuWithNoConcreteVisibleItems
org.eclipse.jface.tests.action.MenuManagerTest ‑ testDisposedMenuIsDirty
org.eclipse.jface.tests.action.MenuManagerTest ‑ testEmptyMenuManagerNPE
org.eclipse.jface.tests.action.MenuManagerTest ‑ testMenuWithNoConcreteVisibleItemsIsHidden
org.eclipse.jface.tests.action.ToolBarManagerTest ‑ testActionImagesAreSet
org.eclipse.jface.tests.action.ToolBarManagerTest ‑ testControlContributionIsSet
org.eclipse.jface.tests.action.ToolBarManagerTest ‑ testCreateControlWhenParentNull
…

AllTests AllActionTests ContributionItemTest ‑ testForceModeText
AllTests AllActionTests ContributionItemTest ‑ testParentLink
AllTests AllActionTests CoolBarManagerTest ‑ testResetItemOrderBug293433
AllTests AllActionTests MenuManagerTest ‑ testAddingConcreteItemToMenuWithNoConcreteVisibleItems
AllTests AllActionTests MenuManagerTest ‑ testDisposedMenuIsDirty
AllTests AllActionTests MenuManagerTest ‑ testEmptyMenuManagerNPE
AllTests AllActionTests MenuManagerTest ‑ testMenuWithNoConcreteVisibleItemsIsHidden
AllTests AllActionTests ToolBarManagerTest ‑ testActionImagesAreSet
AllTests AllActionTests ToolBarManagerTest ‑ testControlContributionIsSet
AllTests AllActionTests ToolBarManagerTest ‑ testCreateControlWhenParentNull
…

This pull request removes 1 skipped test and adds 1 skipped test. Note that renamed tests count towards both.

org.eclipse.jface.tests.fieldassist.ControlDecorationTests ‑ testBug418420

AllTests FieldAssistTestSuite ControlDecorationTests ‑ testBug418420