[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/license.go

@@ -4,6 +4,7 @@
 package commands
 
 import (
+	"context"
 	"errors"
 	"io/ioutil"
 
@@ -56,7 +57,7 @@ func uploadLicenseStringCmdF(c client.Client, cmd *cobra.Command, args []string)
 
 	licenseBytes := []byte(args[0])
 
-	if _, err := c.UploadLicenseFile(licenseBytes); err != nil {
+	if _, err := c.UploadLicenseFile(context.TODO(), licenseBytes); err != nil {
 		return err
 	}
 
@@ -75,7 +76,7 @@ func uploadLicenseCmdF(c client.Client, cmd *cobra.Command, args []string) error
 		return err
 	}
 
-	if _, err := c.UploadLicenseFile(fileBytes); err != nil {
+	if _, err := c.UploadLicenseFile(context.TODO(), fileBytes); err != nil {
 		return err
 	}
 
@@ -85,7 +86,7 @@ func uploadLicenseCmdF(c client.Client, cmd *cobra.Command, args []string) error
 }
 
 func removeLicenseCmdF(c client.Client, cmd *cobra.Command, args []string) error {
-	if _, err := c.RemoveLicenseFile(); err != nil {
+	if _, err := c.RemoveLicenseFile(context.TODO()); err != nil {
 		return err
 	}