fix(AppDiscover): Strip double-quotes from folder name

[solracsf]

• Resolves: [Bug]: Remote images in discover section in AppStore not loading if Windows filename compatibility is enabled #49516

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[solracsf]

/backport to stable31

[solracsf]

/backport to stable30

Too quickly

[solracsf]

EDIT: Applied the fix to the folder creation logic.

[kesselb]

Maybe? ;) I find getEtag and etag a bit weird.

[kesselb]

Suggested change

	$getEtag = $this->discoverFetcher->getETag() ?? date('Y-m');
	$etag = trim($getEtag, '"');
	$etag = $this->discoverFetcher->getETag() ?? date('Y-m');
	$cacheFolderName = trim($getEtag, '"');