[BUGFIX] Fetch correct pid when negative pageUid indicates CE trigger

Change-Id: I0e85cae24db2525791e29162cfbec1cc4a462def
Resolves: #63370
Releases: master
Raised TYPO3 compat version to be installable with CMS 7

Change-Id: Ic04c4c45195b3eac07bf2b648002108b71475f25