Initialize important services before unattended installs

[bergmania]

Description

Fixes a couple of ordering stuff, so unattended install works as expected.

• Fixed some potential locking issues in the AmbiantScopeStacks.
• Removed old Assembly name from the typefinder - We should consider making that list up to date on another PR, but this change just avoids an exception in the log.
• Refactored some hosted services to notifications because they need to execute before unattended install, and the CoreRuntime is executed before hosted services since the Minimal Hosting Model was introduced.
• Move a couple of v14.0 migrations to premigrations to allow stuff to work when upgrading fra v13
• Fixed parallel issue in ConvertBlockEditorPropertiesBase
  • We need to call SuppressFlow when the task is created, but not with the await inside
    • If await is inside, the thread continuing after await is not the same (even with ConfigureAwait(true))
    • It is required on the task, to ensure the AsyncLocals (and thereby the AmbianScopeStack) is null when the task begins
• Fixed a series of smaller (nullablilty) issues, when running with compile-variable DEBUG_SCOPES
• Moved scope creation in DocumentCacheService and MediaCacheService inside the factory method, so we do not create a scope, if we do not touch the database
• Fixed tests according to the above changes.

Tests

• Migrate different v13 databases :)

[kjac]

Looks good to me 💪