feat(domain): Instance APIs with relational tables (#10953)

# Which Problems Are Solved

This PR implements the endpoints listed in
https://github.com/zitadel/zitadel/issues/10443 .

# How the Problems Are Solved

The implementation follows the same pattern as the Organization one.
There are no peculiarities to this PR. The `Update`, `Delete` are
implementing the `Commander` interface, while `Get` and `List`
instance(s) endpoints are implementing the `Querier` interace.

# Additional Context

- Closes #10443
- Depends on #10445

backend/v3/api/org/v2/server.go

@@ -1,21 +0,0 @@
-package orgv2
-
-// this file has been commented out to pass the linter
-
-// import (
-// 	"github.com/zitadel/zitadel/backend/v3/telemetry/logging"
-// 	"github.com/zitadel/zitadel/backend/v3/telemetry/tracing"
-// )
-
-// var (
-// 	logger logging.Logger
-// 	tracer tracing.Tracer
-// )
-
-// func SetLogger(l logging.Logger) {
-// 	logger = l
-// }
-
-// func SetTracer(t tracing.Tracer) {
-// 	tracer = t
-// }