Added new template keys from HCO (#4374)

##### Short description:
HCO hard coded custom template is missing the newly populated
`importsToKeep` and `retentionPolicy` keys, so fails when comparing with
HCO's template

##### More details:

##### What this PR does / why we need it:
Part of 4.22 gating fix

##### Which issue(s) this PR fixes:

##### Special notes for reviewer:
Having trouble reproducing the failure, the test runs and succeeds both
before and after on a new 4.22 cluster. Might only happen on bare metal
clusters

##### jira-ticket:
https://redhat.atlassian.net/browse/CNV-83849


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Tests**
* Updated test configuration for operator image updates to improve test
reliability and resource management.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: Alex <albarker@redhat.com>

Author: albarker-rh

tests/install_upgrade_operators/hco_enablement_golden_image_updates/utils.py

@@ -29,7 +29,9 @@
     },
     "spec": {
         "garbageCollect": OUTDATED,
+        "importsToKeep": 1,
         "managedDataSource": CUSTOM_DATASOURCE_NAME,
+        "retentionPolicy": "None",
         "schedule": WILDCARD_CRON_EXPRESSION,
         "template": {
             "metadata": {},