feat: detect secret data changes via resourceVersion tracking

[michaelhtm]

Description of changes:
Track referenced Secret resourceVersions in an annotation on the ACK
resource. On each sdkFind, populate the annotation with current
resourceVersions. Delta compares stored vs fresh values to detect
when secret data changed without a reference struct change.

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This pull-request has been approved by: michaelhtm

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@michaelhtm: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ec2-controller-test	08de893	link	true	/test ec2-controller-test
sagemaker-controller-test	08de893	link	true	/test sagemaker-controller-test

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