Storage: Add support for sortBy selector (#80680)

* add support for sortBy field selector

* use label selectors instead of field selectors

* set entity_labels on create & update

* make entity server integration tests work

* test fixes

* be more consistent with handling of empty body, meta or status

* workaround for database is locked errors during migration

* fix double import of sqlite3

* rename functions and tidy up

* refactor update

* disable integration tests until we can fix the database locking issue

pkg/services/sqlstore/migrator/migrator.go

@@ -1,13 +1,14 @@
 package migrator
 
 import (
+	"errors"
 	"fmt"
 	"time"
 
 	_ "github.com/go-sql-driver/mysql"
 	"github.com/golang-migrate/migrate/v4/database"
 	_ "github.com/lib/pq"
-	_ "github.com/mattn/go-sqlite3"
+	"github.com/mattn/go-sqlite3"
 	"go.uber.org/atomic"
 	"xorm.io/xorm"
 
@@ -208,6 +209,13 @@ func (mg *Migrator) run() (err error) {
 
 		err := mg.InTransaction(func(sess *xorm.Session) error {
 			err := mg.exec(m, sess)
+			// if we get an sqlite busy/locked error, sleep 100ms and try again
+			if errors.Is(err, sqlite3.ErrLocked) || errors.Is(err, sqlite3.ErrBusy) {
+				mg.Logger.Debug("Database locked, sleeping then retrying", "error", err, "sql", sql)
+				time.Sleep(100 * time.Millisecond)
+				err = mg.exec(m, sess)
+			}
+
 			if err != nil {
 				mg.Logger.Error("Exec failed", "error", err, "sql", sql)
 				record.Error = err.Error()