[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_test.go

@@ -4,6 +4,7 @@
 package commands
 
 import (
+	"context"
 	"errors"
 
 	"github.com/hashicorp/go-multierror"
@@ -40,7 +41,7 @@ func (s *MmctlUnitTestSuite) TestIntegrityCmd() {
 		}
 		s.client.
 			EXPECT().
-			CheckIntegrity().
+			CheckIntegrity(context.Background()).
 			Return(mockResults, &model.Response{}, nil).
 			Times(1)
 
@@ -58,7 +59,7 @@ func (s *MmctlUnitTestSuite) TestIntegrityCmd() {
 
 		s.client.
 			EXPECT().
-			CheckIntegrity().
+			CheckIntegrity(context.Background()).
 			Return(nil, &model.Response{}, errors.New("mock error")).
 			Times(1)
 
@@ -98,7 +99,7 @@ func (s *MmctlUnitTestSuite) TestIntegrityCmd() {
 		}
 		s.client.
 			EXPECT().
-			CheckIntegrity().
+			CheckIntegrity(context.Background()).
 			Return(mockResults, &model.Response{}, nil).
 			Times(1)
 		var expected error