fix(gc): (re)implement cache_chunk_gc_ttl

[solracsf]

Summary

Maybe I've read the code wrongly, so correct me if I'm wrong, but this configurable value was never implemented? 🤔

server/config/config.sample.php

Lines 1866 to 1874 in ac3d09d

	/**
	* TTL of chunks located in the cache folder before they're removed by
	* garbage collection (in seconds). Increase this value if users have
	* issues uploading very large files via the Nextcloud Client as upload isn't
	* completed within one day.
	*
	* Defaults to ``60*60*24`` (1 day)
	*/
	'cache_chunk_gc_ttl' => 60 * 60 * 24,

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)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)