Update morph dependency (#19308)

* Update morph dependency to use a newer version

* remove timeout check for migrations statements

* store/sqlstore: reset timeout for mysql while creating db for migrations

* update morph to v0.2.1

vendor/github.com/go-morph/morph/sources/file/file.go

@@ -70,7 +70,7 @@ func (f *File) readMigrations() error {
 	}
 
 	migrations := []*models.Migration{}
-	walkerr := filepath.Walk(f.path, func(path string, info os.FileInfo, err error) error {
+	walkerr := filepath.Walk(f.path, func(path string, info os.FileInfo, _ error) error {
 		if info.IsDir() {
 			return nil
 		}