Fix PSUseBOMForUnicodeEncodedFile

[joshcorr]

Summary of new feature

Since removing all BOM in from files in #4206 the PSScriptAnalyzer rule has been failing on a few files that still have extended characters in them. These characters should be removed or a PSScriptAnalyzer override should be put in place.

See UseBOMForUnicodeEncodedFile.md for more details

Proposed technical details (if applicable)

Use (Get-Content .\functions\Add-DbaComputerCertificate.ps1) -match "[\x90-\xFF]" to find the affected lines in each file and replace it with appropriate text. In the file above the offending code is ¯\_(ツ)_/¯ and it would be replaced or deleted. ¯\_(ツ)_/¯

[niphlod]

we do not check that rule in BOH for a reason... the whole file is checked without considering if it's actual code or not. In any case, better safe than sorry.