Install-DbaInstance - Test for allowed ACTION before adding SQLTEMPDBFILECOUNT

[andreasjordan]

Type of Change

• Bug fix (non-breaking change, fixes # )
• New feature (non-breaking change, adds functionality )
• Breaking change (effects multiple commands or functionality, fixes # )
• Ran manual Pester test and has passed (.\tests\manual.pester.ps1)
• Adding code coverage to existing functionality
• Pester test is included
• If new file reference added for test, has is been added to github.com/sqlcollaborative/appveyor-lab ?
• Unit test is included
• Documentation
• Build system

Purpose

I want to be able to run ACTION=Uninstall and use -ConfigurationFile for that.
It's a similar case like #6479 that was addressed with #6480.
To be totally flexible I asked the documentation what ACTIONs allow SQLTEMPDBFILECOUNT:
https://docs.microsoft.com/en-us/sql/database-engine/install-windows/install-sql-server-from-the-command-prompt
So I added these 5 ACTIONs.
I moved the test so that there is no unsused call to the computer for no reason.

@nvarscar : What do you think? If you would like to solve it some other way, I'm open for feedback.

[nvarscar]

That makes sense, no reason to add tempdb file count upon uninstall

[potatoqualitee]

Thank you both! 🥳