fix: BED-6026 adding the domainSid to _unresolvablePrincipals cache to prevent repeated resolving

[ktstrader]

Description

SH tries to repeatedly resolve unresolvable SIDs from a non-domain-joined Windows machine.

Motivation and Context

https://specterops.atlassian.net/browse/BED-6026
#203

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Chore (a change that does not modify the application functionality)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Documentation updates are needed, and have been made accordingly.
• I have added and/or updated tests to cover my changes.
• All new and existing tests passed.
• My changes include a database migration.

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[ktstrader]

GetDomain returns false if the external call returns an exception. So I figured we can add the SID to _unresolvablePrincipals when it checks the domain and it comes back blank. This can avoid any other attempts to try and resolve that SID and lower the execution time that the user had stated they were experiencing.

[ktstrader]

I have not been able to test this. Mini GOAD has let me down