[BUGFIX] Avoid type errors in `ResourceFactory` methods

With #92289 logic has been decoupled from `ResourceFactory`
into the `StorageRepository`. As a side change, native php
types have been added to a couple of methods.

`StorageRepository->findByUid()` parameter type has been set
to integer, which breaks the `null` fallback and retrieving
the default storage `uid: 0` in `ResourceFactory` method
`getStorageObjectFromCombinedIdentifier()`. Even worse is
the fact that `getObjectFromCombinedIdentifier()` does not
even try to cope with a invalid identifier provided.

This change modifies `getObjectFromCombinedIdentifier()` and
`getStorageObjectFromCombinedIdentifier` of `ResourceFactory`
to cope with missing storage identifier by falling back to
the default storage (`0`) with a shuffle of the exploded values.

As a side-effect two PHPStan ignore patterns can be removed
from the PHPStan baseline file.

Used command(s):

  Build/Scripts/runTests.sh -s phpstanGenerateBaseline

Resolves: #102692
Related: #92289
...