feat: Add repair step for deduplicating mounts

[provokateurin]

Summary

Since #32877 the index is no longer unique and there can be duplicate entries in oc_mounts. This repair step removes them, but doesn't fix the root cause.

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)

[nickvergessen]

/backport! to stable31

[nickvergessen]

Need to trigger the backport for updated autoloader files

[nickvergessen]

According to Robin it is fine to remove all entries, so instead we should use

server/lib/public/IDBConnection.php

Lines 298 to 311 in c414dde

	/**
	* Truncate a table data if it exists
	*
	* Cascade is not supported on many platforms but would optionally cascade the truncate by
	* following the foreign keys.
	*
	* @param string $table table name without the prefix
	* @param bool $cascade whether to truncate cascading
	* @throws Exception
	* @since 32.0.0
	*
	* @psalm-taint-sink sql $table
	*/
	public function truncateTable(string $table, bool $cascade): void;

Then we also don't need a progressbar or anything.

[salmart-dev]

According to Robin it is fine to remove all entries, so instead we should use

server/lib/public/IDBConnection.php

Lines 298 to 311 in c414dde

	/**
	* Truncate a table data if it exists
	*
	* Cascade is not supported on many platforms but would optionally cascade the truncate by
	* following the foreign keys.
	*
	* @param string $table table name without the prefix
	* @param bool $cascade whether to truncate cascading
	* @throws Exception
	* @since 32.0.0
	*
	* @psalm-taint-sink sql $table
	*/
	public function truncateTable(string $table, bool $cascade): void;

Then we also don't need a progressbar or anything.

I removed the code deleting rows and just added a truncate table statement. I also removed the test, since IMO there's no point in testing this.

[provokateurin]

@salmart-dev autoloaders need to be updated.

[salmart-dev]

@provokateurin I undid the change with the prefix which didn't make sense and the original error is back: on Oracle tests ERROR: An exception occurred while executing a query: ORA-00942: table or view "SYSTEM"."OC_MOUNTS" does not exist

Do you have any idea why this may be happening? looking at the error, it seems like the right DB is not being selected (system instead of nextcloud).

[nickvergessen]

Truncate is rather new, maybe it was never used/tested against Oracle?
https://github.com/nextcloud/server/blame/5ecd3c4b495f3fdd959b2e2f8569a402b5d84af0/lib/private/DB/Connection.php#L715-L718

But can't see from a quick glance where it would do something wrong.

[provokateurin]

@salmart-dev maybe truncate is available now, since we dropped some really old Oracle versions.

[provokateurin]

Closing in favor of #56933