Introduce relationship management rules to opslevel go

[andrewstillv15]

Resolves # https://gitlab.com/jklabsinc/OpsLevel/-/issues/14147

Problem

Customers are asking for management rule support in terraform

Solution

I've added management rules & allowed categories to opslevel go

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.
• Does this change require a Terraform schema change?
  • If so what is the ticket or PR # WIP
• Make a changie entry that explains the customer facing outcome of this change

[derek-etherton-opslevel]

lookin good, tested crud and it all worked great! Just some minor comments