SQL: Add sql template test helper (#91953)

pkg/storage/unified/sql/testdata/sqlite--resource_delete-simple.sql

@@ -0,0 +1,7 @@
+DELETE FROM "resource"
+    WHERE 1 = 1
+        AND "namespace" = 'nn'
+        AND "group"     = 'gg'
+        AND "resource"  = 'rr'
+        AND "name"      = 'name'
+;