feat: instance domain APIs with relational tables (#11051)

# Which Problems Are Solved

This PR implements the endpoints listed in
https://github.com/zitadel/zitadel/issues/10444 .

# How the Problems Are Solved

The implementation follows the same pattern as the Instance one. The
`Add` and `Remove` are implementing the `Commander` interface, while
`List` Domains endpoints are implementing the `Querier` interace.

The PR adds also some forgotten calls to the relational logic for the
Instance API. The commits are identifiable by the label `instance:`
prepended to them. This is the complete list: bafce01b0 , 6fe7257ab ,
e27bc9c34 , 8133ede73 , fde667953 , a3e1135ed , ee1a6f9c1

# Additional Context

- Closes #10444

---------

Co-authored-by: Elio Bischof <[email protected]>
Co-authored-by: Lebogang Phoshoko <[email protected]>
Co-authored-by: Wim Van Laer <[email protected]>
Co-authored-by: Max Peintner <[email protected]>
Co-authored-by: Gayathri Vijayan <[email protected]>

internal/command/instance_domain_test.go

@@ -313,8 +313,9 @@ func TestCommandSide_RemoveInstanceDomain(t *testing.T) {
 		eventstore *eventstore.Eventstore
 	}
 	type args struct {
-		ctx    context.Context
-		domain string
+		ctx             context.Context
+		domain          string
+		errorIfNotFound bool
 	}
 	type res struct {
 		want *domain.ObjectDetails
@@ -342,7 +343,7 @@ func TestCommandSide_RemoveInstanceDomain(t *testing.T) {
 			},
 		},
 		{
-			name: "domain not exists, precondition error",
+			name: "domain not exists and errorIfNotFound set to TRUE should return not found error",
 			fields: fields{
 				eventstore: eventstoreExpect(
 					t,
@@ -350,13 +351,29 @@ func TestCommandSide_RemoveInstanceDomain(t *testing.T) {
 				),
 			},
 			args: args{
-				ctx:    context.Background(),
-				domain: "domain.ch",
+				ctx:             context.Background(),
+				domain:          "domain.ch",
+				errorIfNotFound: true,
 			},
 			res: res{
 				err: zerrors.IsNotFound,
 			},
 		},
+		{
+			name: "domain not exists and errorIfNotFound set to FALSE should return no error",
+			fields: fields{
+				eventstore: eventstoreExpect(
+					t,
+					expectFilter(),
+				),
+			},
+			args: args{
+				ctx:             context.Background(),
+				domain:          "domain.ch",
+				errorIfNotFound: false,
+			},
+			res: res{},
+		},
 		{
 			name: "remove domain, ok",
 			fields: fields{
@@ -420,7 +437,7 @@ func TestCommandSide_RemoveInstanceDomain(t *testing.T) {
 			r := &Commands{
 				eventstore: tt.fields.eventstore,
 			}
-			got, err := r.RemoveInstanceDomain(tt.args.ctx, tt.args.domain)
+			got, err := r.RemoveInstanceDomain(tt.args.ctx, tt.args.domain, tt.args.errorIfNotFound)
 			if tt.res.err == nil {
 				assert.NoError(t, err)
 			}