[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/integrity.go

@@ -4,6 +4,7 @@
 package commands
 
 import (
+	"context"
 	"fmt"
 
 	"github.com/hashicorp/go-multierror"
@@ -84,7 +85,7 @@ func integrityCmdF(c client.Client, command *cobra.Command, args []string) error
 
 	verboseFlag, _ := command.Flags().GetBool("verbose")
 
-	results, _, err := c.CheckIntegrity()
+	results, _, err := c.CheckIntegrity(context.TODO())
 	if err != nil {
 		return fmt.Errorf("unable to perform integrity check. Error: %w", err)
 	}