[BUGFIX] Allow access to a sub-branch of a workspace for a limited user

Consider the case you have N workspaces and some BE "advanced users"
and "limited users” having access to a workspace.

"Advanced users" have access to all workspace’s page tree and
also LIVE workspace, in this case everything works correctly.

"Limited users" have access only to a limited page tree of the workspace
and cannot access to LIVE workspace. When the user logs in, the page
tree doesn’t show up and the system indicate the following error:
"Page tree error Got unexpected response from the server.
Please check logs for details"

This patch fixes the "limited user" problem.

Resolves: #91918
Resolves: #91594
Releases: master, 10.4
Change-Id: I0029add1940504ad1d274eac4ab02ff2af69f96d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65755


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Danilo Caccialanza <supercaccia@bluewin.ch>
Tested-by: cbugada <christian.bugada@ti.ch>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Danilo Caccialanza <supercaccia@bluewin.ch>
Reviewed-by: Benni Mack <benni@typo3.org>