[BUGFIX] inject* methods in FAL inhibit use of Extbase object manager

The ResourceStorage class of FAL has two inject* methods which are seen
as dependency injectors by the Extbase object manager. Thus an exception
is thrown when a ResourceStorage object is created via Extbase.

This commit changes the two method's names and adjust all usages within
the core. These methods are internal and I don't expect them to be used
anywhere else, so we don't need a backwards compatibility layer.

Change-Id: I4b73445708cf8041b505b5ea8923dc595ddaadb0
Resolves: #45319
Releases: 6.1, 6.0
Reviewed-on: https://review.typo3.org/18882
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[BUGFIX] Exception when deleted file is in clipboard

When a file is deleted while it is part of a clipboard, an exception is
thrown when the clipboard is reconstituted. This exception has to be
catched, otherwise the file module will be unusable.

Change-Id: I8849644ffa7b78559c1797d85ce3cc6e01d03a74
Resolves: #43906
Releases: 6.1, 6.0
Reviewed-on: https://review.typo3.org/18884
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn