[BUGFIX] Refresh browser cache when ckeditor config or plugins changes

CKEDITOR.timestamp now contains also a hash of the configuration.
This is appended to uri when CKeditor loads resources.

This mitigates issues with browser caching when CKeditor plugins are
updated.

Resolves: #88369
Releases: master,9.5,8.7

Change-Id: I9f4a8f611683db93c47b62d22871eac23f3a8819
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/60819


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>