[BUGFIX] Let import handle missing TCA for file relations better

If a file relation's field config is missing the import now adds an
error that makes identifying the broken TCA possible.

Resolves: #103282
Releases: main, 12.4
Change-Id: I622b98fc256df2a994f0ff1477aebdd9b3953a4d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83211


Reviewed-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: Garvin Hicking <gh@faktor-e.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Willi Wehmeier <wwwehmeier@gmail.com>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Willi Wehmeier <wwwehmeier@gmail.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>