[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/api.go

@@ -45,6 +45,7 @@ type Routes struct {
 	ChannelMembers           *mux.Router // 'api/v4/channels/{channel_id:[A-Za-z0-9]+}/members'
 	ChannelMember            *mux.Router // 'api/v4/channels/{channel_id:[A-Za-z0-9]+}/members/{user_id:[A-Za-z0-9]+}'
 	ChannelMembersForUser    *mux.Router // 'api/v4/users/{user_id:[A-Za-z0-9]+}/teams/{team_id:[A-Za-z0-9]+}/channels/members'
+	ChannelModerations       *mux.Router // 'api/v4/channels/{channel_id:[A-Za-z0-9]+}/moderations'
 
 	Posts           *mux.Router // 'api/v4/posts'
 	Post            *mux.Router // 'api/v4/posts/{post_id:[A-Za-z0-9]+}'
@@ -156,6 +157,7 @@ func Init(configservice configservice.ConfigService, globalOptionsFunc app.AppOp
 	api.BaseRoutes.ChannelMembers = api.BaseRoutes.Channel.PathPrefix("/members").Subrouter()
 	api.BaseRoutes.ChannelMember = api.BaseRoutes.ChannelMembers.PathPrefix("/{user_id:[A-Za-z0-9]+}").Subrouter()
 	api.BaseRoutes.ChannelMembersForUser = api.BaseRoutes.User.PathPrefix("/teams/{team_id:[A-Za-z0-9]+}/channels/members").Subrouter()
+	api.BaseRoutes.ChannelModerations = api.BaseRoutes.Channel.PathPrefix("/moderations").Subrouter()
 
 	api.BaseRoutes.Posts = api.BaseRoutes.ApiRoot.PathPrefix("/posts").Subrouter()
 	api.BaseRoutes.Post = api.BaseRoutes.Posts.PathPrefix("/{post_id:[A-Za-z0-9]+}").Subrouter()