[BUGFIX] Avoid side effect in acceptance tests

FalMetadataCest changes the title of styleguide
'bus_lane.jpg'. InlineFalCest uses the title to
look up details in element information modal and
stumbles. Check for the filename only to avoid
this side effect.

Resolves: #102523
Releases: 11.5
Change-Id: I6b111194e9888690bf630ef24b86ac8947223127
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81971


Reviewed-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Kienast <a.fernandez@scripting-base.de>
Reviewed-by: Andreas Kienast <a.fernandez@scripting-base.de>