Chore: Use TimeNow instead of time.Now in user sql store to make it testable (#54983)

pkg/services/sqlstore/time.go

@@ -0,0 +1,16 @@
+package sqlstore
+
+import "time"
+
+// TimeNow makes it possible to test usage of time
+var TimeNow = time.Now
+
+func MockTimeNow(constTime time.Time) {
+	TimeNow = func() time.Time {
+		return constTime
+	}
+}
+
+func ResetTimeNow() {
+	TimeNow = time.Now
+}