[!!!][FEATURE] Introduce URL rewrites for Backend links

This change removes the &route parameter from all
Backend URLs, and changes them to speaking URLs
like /typo3/main?token=123123123.

For this change, it is necessary to adapt the
installations' webserver configuration rewrite
rules to enable URL rewriting in TYPO3 Backend.

An silent upgrader will automatically update
existing webserver configuration files like
.htaccess or web.config to adapt to the TYPO3
Backend navigation concepts.

Further steps will be using the browsers pushState
functionality to update the URL when a module changes,
and further deep-linking into TYPO3 Backend.

Resolves: #93048
Releases: master
Change-Id: Icdccfb4dbba71d2ecd08d619ed17ff49f6225b3e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/67083


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>