[BUGFIX] Add arguments to the MimeTypeValidator error object

Enriches the ext:form MimeTypeValidator error object with the mime type
of the validated file.

Resolves: #88236
Releases: master, 9.5
Change-Id: Ie2ec6950c58841f4f942e38acf4a36a9b8b9635c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/60601


Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Ralf Zimmermann <ralf.zimmermann@tritum.de>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Ralf Zimmermann <ralf.zimmermann@tritum.de>