fix: fix loading shares in folder when share is moved

[icewind1991]

Trying to construct the target of the parent share doesn't work if the share is moved, but also isn't necessary if we already match the path of the moved share.

Server master doesn't currently trigger the bug in the integration tests because cache gc is triggering a full fs setup (nextcloud/server#52000)

[nickvergessen]

• That is a direct revert of 6baf7f9 from perf(sharing): Split getShareWith() and shortcut the happy path with $path #17094
• So cc @artonge

The integration test makes sense.

It fails on master server with commented out GC in base.php and passes with this PR in the same case

    When user "participant3" gets the DAV properties for "/Talk/test"                   # SharingContext::userGetsTheDavPropertiesFor()
    Then the list of returned files for "participant3" is                               # SharingContext::theListOfReturnedFilesForIs()
      | /Talk/test/            |
      | /Talk/test/renamed.txt |
      Failed asserting that two arrays are equal.
      --- Expected
      +++ Actual
      @@ @@
       Array (
           0 => '/remote.php/dav/files/partici.../test/'
      -    1 => '/remote.php/dav/files/partici...ed.txt'
       )

[nickvergessen]

/backport to stable33