[FOLLOWUP][TASK] Deprecate BackendUtility::getRecordRaw

Rename .rst file since the colons give headaches on windows.

Change-Id: I710a030ce7335b294d081e237a019cec6b7ca74f
Resolves: #80317
Releases: master
Reviewed-on: https://review.typo3.org/52125


Reviewed-by: Benjamin Kott <benjamin.kott@outlook.com>
Tested-by: Benjamin Kott <benjamin.kott@outlook.com>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>