[BUGFIX] Extract width and height meta data for all image files

Instead of looking at the mime type of the file, the configured
image file extensions is checked to decide whether to extract
width and height for sys_file_metadata.

This allows pdf files to have their width and height to be extracted.

While the exact pixel values do not matter much for a PDF,
the ratio of width and height (landscape or portrait or even square)
can be very useful to "know".

Releases: master, 10.4, 9.5
Resolves: #91967
Change-Id: I354be4f07edf6e4c3b59748ccb87b67dd66caa8e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65323
Tested-by: Helmut Hummel <typo3@helhum.io>
Tested-by: TYPO3com <noreply@typo3.com>
Reviewed-by: Helmut Hummel <typo3@helhum.io>

typo3/sysext/core/Classes/Resource/Index/Indexer.php

@@ -302,7 +302,7 @@ protected function extractRequiredMetaData(File $fileObject)
     {
         // since the core desperately needs image sizes in metadata table do this manually
         // prevent doing this for remote storages, remote storages must provide the data with extractors
-        if ($fileObject->getType() == File::FILETYPE_IMAGE && $this->storage->getDriverType() === 'Local') {
+        if ($this->storage->getDriverType() === 'Local' && GeneralUtility::inList(strtolower($GLOBALS['TYPO3_CONF_VARS']['GFX']['imagefile_ext'] ?? ''), $fileObject->getExtension())) {
             $rawFileLocation = $fileObject->getForLocalProcessing(false);
             $imageInfo = GeneralUtility::makeInstance(ImageInfo::class, $rawFileLocation);
             $metaData = [