* Expected value comes before actual value in assert.Equal()
* Use assert.Equal() instead of assert.True() when possible
* Add a unit test that verifies no-op pod updates to the
secret_manager and the configmap_manager
* Add a clarifying comment about why it's good to seemingly
delete a secret on updates.
* Fix (for now, non-buggy) variable shadowing issue
Automatic merge from submit-queue (batch tested with PRs 39538, 40188, 40357, 38214, 40195)
Use SecretManager when getting secrets for EnvFrom
Merges crossed in the night which missed this needed change.
