[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/export_test.go

@@ -4,6 +4,7 @@
 package commands
 
 import (
+	"context"
 	"fmt"
 	"net/http"
 
@@ -23,7 +24,7 @@ func (s *MmctlUnitTestSuite) TestExportCreateCmdF() {
 
 		s.client.
 			EXPECT().
-			CreateJob(mockJob).
+			CreateJob(context.Background(), mockJob).
 			Return(mockJob, &model.Response{}, nil).
 			Times(1)
 
@@ -43,7 +44,7 @@ func (s *MmctlUnitTestSuite) TestExportCreateCmdF() {
 
 		s.client.
 			EXPECT().
-			CreateJob(mockJob).
+			CreateJob(context.Background(), mockJob).
 			Return(mockJob, &model.Response{}, nil).
 			Times(1)
 
@@ -65,7 +66,7 @@ func (s *MmctlUnitTestSuite) TestExportDeleteCmdF() {
 
 	s.client.
 		EXPECT().
-		DeleteExport(exportName).
+		DeleteExport(context.Background(), exportName).
 		Return(&model.Response{StatusCode: http.StatusOK}, nil).
 		Times(1)
 
@@ -83,7 +84,7 @@ func (s *MmctlUnitTestSuite) TestExportListCmdF() {
 
 		s.client.
 			EXPECT().
-			ListExports().
+			ListExports(context.Background()).
 			Return(mockExports, &model.Response{}, nil).
 			Times(1)
 
@@ -104,7 +105,7 @@ func (s *MmctlUnitTestSuite) TestExportListCmdF() {
 
 		s.client.
 			EXPECT().
-			ListExports().
+			ListExports(context.Background()).
 			Return(mockExports, &model.Response{}, nil).
 			Times(1)