Use request.CTX instead of *request.Context (#24877)

* Use request.CTX instead of *request.Context

* Fix tests

server/channels/app/syncables.go

@@ -121,7 +121,7 @@ func (a *App) createDefaultTeamMemberships(c request.CTX, params model.CreateDef
 // are configured to sync with teams and channels for group members on or after the given timestamp.
 // If includeRemovedMembers is true, then members who left or were removed from a team/channel will
 // be re-added; otherwise, they will not be re-added.
-func (a *App) CreateDefaultMemberships(c *request.Context, params model.CreateDefaultMembershipParams) error {
+func (a *App) CreateDefaultMemberships(c request.CTX, params model.CreateDefaultMembershipParams) error {
 	err := a.createDefaultTeamMemberships(c, params)
 	if err != nil {
 		return err
@@ -137,7 +137,7 @@ func (a *App) CreateDefaultMemberships(c *request.Context, params model.CreateDe
 
 // DeleteGroupConstrainedMemberships deletes team and channel memberships of users who aren't members of the allowed
 // groups of all group-constrained teams and channels.
-func (a *App) DeleteGroupConstrainedMemberships(c *request.Context) error {
+func (a *App) DeleteGroupConstrainedMemberships(c request.CTX) error {
 	err := a.deleteGroupConstrainedChannelMemberships(c, nil)
 	if err != nil {
 		return err