Test files:scan occ command

[skshetry]

Part of #33613

• Test files:scan <user_id> (Test files:scan #33647)
• Test files:scan --path=<path (Test files:scan #33647)
• Test files:scan --group=<group> (Test files:scan #33647)
• Test files:scan --group=<group> negative tests (Test file scan group negative validation #33767)
• Test files:scan <user_id> negative tests (Test files:scan for specific users (negative validation) #33747)
• Test files:scan --repair
  hard to do setup the problems it solves and needs to be run in single user mode
• Test files:scan --unscanned
  hard to set up the problem it solves as it scans not fully scanned file.

[ownclouders]

GitMate.io thinks possibly related issues are #22492 (test), #22485 (test), #31579 (test), #18994 (Issue with command "occ files:scan"), and #29635 (Add basic tests for files:scan command).

[skshetry]

Blocked due to #33630.

EDIT: Bug fixed by #33632

[skshetry]

Some of the tests requires multiple local storages set up (ref: #33679 ). So, until it's done, we cannot work on negative tests.