SQLTemplate: Make Ident only work for identifiers (not any string) (#92387)

pkg/storage/unified/sql/testdata/mysql--resource_version_get-single path.sql

@@ -1,8 +1,8 @@
 SELECT
-        "resource_version"
-    FROM "resource_version"
+        `resource_version`
+    FROM `resource_version`
     WHERE 1 = 1
-        AND "group"    = ''
-        AND "resource" = ''
+        AND `group`    = ''
+        AND `resource` = ''
     FOR UPDATE
 ;