[MM-49989] Pass a context.Context to Client4 methods (#22922)

* Migrate all method in model/client4.go to accept a context.Context

* Fix th.*Client

* Fix remaining issues

* Empty commit to triger CI

* Fix test

* Add cancellation test

* Test that returned error is context.Canceled

* Fix bad merge

* Update mmctl code

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/cmd/mmctl/commands/team_users.go

@@ -4,6 +4,7 @@
 package commands
 
 import (
+	"context"
 	"errors"
 	"fmt"
 
@@ -72,7 +73,7 @@ func removeUserFromTeam(c client.Client, team *model.Team, user *model.User, use
 	}
 
 	var err error
-	if _, err = c.RemoveTeamMember(team.Id, user.Id); err != nil {
+	if _, err = c.RemoveTeamMember(context.TODO(), team.Id, user.Id); err != nil {
 		err = fmt.Errorf("unable to remove '%s' from %s. Error: %w", userArg, team.Name, err)
 		printer.PrintError(err.Error())
 	}
@@ -102,7 +103,7 @@ func teamUsersAddCmdF(c client.Client, cmd *cobra.Command, args []string) error
 }
 
 func addUserToTeam(c client.Client, team *model.Team, user *model.User, userArg string) {
-	if _, _, err := c.AddTeamMember(team.Id, user.Id); err != nil {
+	if _, _, err := c.AddTeamMember(context.TODO(), team.Id, user.Id); err != nil {
 		printer.PrintError("Unable to add '" + userArg + "' to " + team.Name + ". Error: " + err.Error())
 	}
 }