[TASK] Document that TYPO3 is not compatible with MySQL strict mode

Document that in the requirements section of the INSTALL.md.

Resolves: #54883
Releases: 6.2
Change-Id: Idd80528493b9920f4488e359f13fe4304ac5fe25
Reviewed-on: https://review.typo3.org/26725
Reviewed-by: Wouter Wolters
Reviewed-by: Philipp Gampe
Reviewed-by: Aske Ertmann
Reviewed-by: Oliver Klee
Reviewed-by: Stefan Neufeind
Reviewed-by: Michael Stucki
Tested-by: Michael Stucki
Reviewed-by: Markus Klein
Tested-by: Markus Klein