Allow alias usage for the domain and system owner

[rocktavious]

Resolves https://github.com/OpsLevel/team-platform/issues/461

Problem

Domain and System owner field cannot properly take a team alias.

Solution

Uses the opslevel-go cache to lookup a team by the alias to find the ID to feed into the mutations.

Checklist

• I have run this code, and it appears to resolve the stated issue.
• This PR does not reduce total test coverage
• This PR has no user interface changes or has already received approval from product management to change the interface.
• Make a changie entry that explains the customer facing outcome of this change

[davidbloss]

LGTM 🎉