Fix empty object behavior in the DCL (#4803) (#3274)

* Add cmek to spanner database

* Update timeout

* Mark test as beta

* Move to handwritten test

* Adding dcl for gkehub feature

* Mostly working

* Add extra test steps

* Getting closer, still fails with hierarchy controller set

* Adding empty object instead of nil

* Updating test, when to use empty struct

* Correct ordering

* Remove service account, use empty string instead of nil

* Fix merge, skip product info if no resource at version

* Remove tests on field that is broken

* Remove gkehub, only dcl updates

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/4803.txt

@@ -0,0 +1,3 @@
+```release-note:none
+
+```