[Bug] Gc06_check_encryption_at_rest_part2 domain reporting incorrectly

[dutt0]

Description of the bug/Issue
gc06_check_encryption_at_rest_part2 lambda function is finding OpenSearch domains in accounts even if they were deleted and flagging them as non-compliant.

Resources that are affected
OpenSearch and ElasticSearch domains

Screenshots
In the following screenshot, we can see that there is only on OpenSearch domain

But in AWS config, we can see that we have another one marked as non-compliant, even though this one was already deleted

Current behavior
In the gc06_check_encryption_at_rest_part2 lambda function, doesn't find the deleted domain. But its showing up in the aws config.

Expected behavior
To report on the actual resources that are present in the account and exclude older resources that no longer exist.

Additional context
Originally reported in the old repo