[BUGFIX] Use checksum of frontend groups in cache identifier

The generated cache identifier may get very long in case a page has many
frontend groups configured and may exceeds the limit of the caching
frontend (which is 250 characthers per definition in
FrontendInterface::PATTERN_ENTRYIDENTIFIER). To bypass this issue, the
group list is hashed now.

Resolves: #91413
Related: #91208
Releases: master, 9.5
Change-Id: Id44ae862eb5d45afbd49dc3f833c101c6acb5f5b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64512


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Frank W Blank <blank@wiro-consultants.com>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>