Toss out CAs processed without SIDs

[definitelynotagoblin]

Description

Pairs with SpecterOps/SharpHoundCommon#108
When no SID is resolved for a CA we don't want to process the edge or node. Currently SharpHoundCommon has a hostname fallback, where if a SID cannot be resolved a hostname is returned instead, and so for CAs that can't be found in LDAP we still process them as "no name" domain objects if they exist in the DNS. We want instead to throw these nodes/edges out if they can't be queried by LDAP.

Motivation and Context

https://specterops.atlassian.net/browse/BED-4206

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.