[MM-22206] Add PATCH channel moderations (PUT /moderations/patch) (#13845)

* MM-22205 Add get channel moderations endpoint

* MM-22206 Add patch channel moderations endpoint

Add api tests for patch channel moderations

* MM-22205 Ensure ordered permissions returned and create struct ChannelModeratedRoles

* MM-22206 Use structs instead of map

* MM-22206 Add test cases for GetChannelModeratedPermissions

* MM-22206 Add tests for ChannelModeratedPermissionsChangedByPatch

* MM-22206 Use NewBool instead of defining booleans

* MM-22206 Tie Channel Mentions to Create Posts when building Channel Moderations

* Revert "MM-22206 Tie Channel Mentions to Create Posts when building Channel Moderations"

This reverts commit a0bfc95f1732955c5ef5fc3e4b05ea8ab954acea.

* MM-22206 Review changes

Modify GetSchemeRolesForChannel to return named variables
Change calls to SessionHasPermissionToChannel to SessionHasPermissionTo
Add a CreateChannelScheme method
Add a DeleteChannelScheme method
Move GetChannelModeratedPermissions to Role model

* Fix lint

* Add ChannelModeration methods to App interface

* MM-22206 Rename method to GetTeamSchemeChannelRoles

* MM-22206 Check CHANNEL_MODERATED_PERMISSIONS_MAP for existing permission before iterating through it

* Modify wording to higherScoped to match #13813

* MM-22206 Delete channel scheme between tests

* MM-22206 Fix tests

* Actually patch role

* MM-22206 Shadow declaration of err

api4/apitestlib.go

@@ -1009,3 +1009,25 @@ func (me *TestHelper) AddPermissionToRole(permission string, roleName string) {
 
 	utils.EnableDebugLogForTest()
 }
+
+func (me *TestHelper) SetupTeamScheme() *model.Scheme {
+	return me.SetupScheme(model.SCHEME_SCOPE_TEAM)
+}
+
+func (me *TestHelper) SetupChannelScheme() *model.Scheme {
+	return me.SetupScheme(model.SCHEME_SCOPE_CHANNEL)
+}
+
+func (me *TestHelper) SetupScheme(scope string) *model.Scheme {
+	scheme := model.Scheme{
+		Name:        model.NewId(),
+		DisplayName: model.NewId(),
+		Scope:       scope,
+	}
+
+	if scheme, err := me.App.CreateScheme(&scheme); err == nil {
+		return scheme
+	} else {
+		panic(err)
+	}
+}