Remove all internal/deprecated api usage

[Azn9]

IntelliJ IDEA Ultimate 2023.3.2
Internal methods usages (6)
- ApplicationInitializedListener.componentsInitialized() (3)
- ApplicationInitializedListener.execute(...) (3)
Internal interfaces usages (3)
- ApplicationInitializedListener (3)

Deprecated methods usages (7)
- ApplicationInitializedListener.componentsInitialized() (3)
- DvcsUtil.guessRepositoryForFile(...) (1)
- IdeEventQueue.addIdleListener(Runnable, int) (1)
- IdeEventQueue.removeIdleListener(Runnable) (1)
- ExtensionPointName.extensions() (1)
Deprecated constructor usage (1)
- NotificationGroup.<init>(...) (1)
Deprecated interface usage (1)
- StartupActivity.Background (1)

IntelliJ IDEA Ultimate 2021.2.4
Internal interfaces usages (3)
- ApplicationInitializedListener (3)

Internal methods usages (3)
- ApplicationInitializedListener.componentsInitialized() (3)

Deprecated constructor usage (1)
- NotificationGroup.<init>(...) (1)