[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/extract_e2e_test.go

@@ -4,6 +4,7 @@
 package commands
 
 import (
+	"context"
 	"os"
 	"path/filepath"
 	"time"
@@ -45,7 +46,7 @@ func (s *MmctlE2ETestSuite) TestExtractRunCmdF() {
 		info, err := file.Stat()
 		s.Require().NoError(err)
 
-		us, _, err := s.th.SystemAdminClient.CreateUpload(&model.UploadSession{
+		us, _, err := s.th.SystemAdminClient.CreateUpload(context.Background(), &model.UploadSession{
 			ChannelId: s.th.BasicChannel.Id,
 			Filename:  info.Name(),
 			FileSize:  info.Size(),
@@ -53,7 +54,7 @@ func (s *MmctlE2ETestSuite) TestExtractRunCmdF() {
 		s.Require().NoError(err)
 		s.Require().NotNil(us)
 
-		_, _, err = s.th.SystemAdminClient.UploadData(us.Id, file)
+		_, _, err = s.th.SystemAdminClient.UploadData(context.Background(), us.Id, file)
 		s.Require().NoError(err)
 
 		cmd := &cobra.Command{}