[MM-32281] SqlRoleStore/GetByName: add context to allow read from master (#17176)

* role_store/GetByName: add context

* propagate context in the app layer

* propagate context in the app layer

* add missing import

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

api4/group_test.go

@@ -4,6 +4,7 @@
 package api4
 
 import (
+	"context"
 	"fmt"
 	"net/http"
 	"testing"
@@ -596,7 +597,7 @@ func TestPatchGroupChannel(t *testing.T) {
 	assert.NotNil(t, groupSyncable)
 	assert.True(t, groupSyncable.AutoAdd)
 
-	role, err := th.App.GetRoleByName("channel_user")
+	role, err := th.App.GetRoleByName(context.Background(), "channel_user")
 	require.Nil(t, err)
 	originalPermissions := role.Permissions
 	_, err = th.App.PatchRole(role, &model.RolePatch{Permissions: &[]string{}})