fix(CI): Skip some CI work from forks as they don't work anyway

[nickvergessen]

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)

[skjnldsv]

Doesn't work

[skjnldsv]

#46522

[skjnldsv]

##[debug]Evaluating condition for step: 'Disabled on forks'
##[debug]Evaluating: (success() && (github.event.pull_request.head.repo.full_name != github.repository))
##[debug]Evaluating And:
##[debug]..Evaluating success:
##[debug]..=> true
##[debug]..Evaluating NotEqual:
##[debug]....Evaluating Index:
##[debug]......Evaluating Index:
##[debug]........Evaluating Index:
##[debug]..........Evaluating Index:
##[debug]............Evaluating Index:
##[debug]..............Evaluating github:
##[debug]..............=> Object
##[debug]..............Evaluating String:
##[debug]..............=> 'event'
##[debug]............=> Object
##[debug]............Evaluating String:
##[debug]............=> 'pull_request'
##[debug]..........=> null
##[debug]........=> null
##[debug]......=> null
##[debug]....=> null
##[debug]....Evaluating Index:
##[debug]......Evaluating github:
##[debug]......=> Object
##[debug]......Evaluating String:
##[debug]......=> 'repository'
##[debug]....=> 'nextcloud/server'
##[debug]..=> true
##[debug]=> true
##[debug]Expanded: (true && (null != 'nextcloud/server'))
##[debug]Result: true
##[debug]Starting: Disabled on forks

[nickvergessen]

Ah, issue_comment runs on master.
Checking