fix: avoid returning resolved on error

[michaelhtm]

Description of changes:
Using resolved as a return value may not always lead to desired results.
When ResolveReferences is called for resources that don't reference any other resources, it returns a direct pointer to the desired resource instead of a copy. This causes an aliasing issue where modifications to the resolved resource inadvertently affect the desired resource.

Impact: When the ACK runtime adds conditions to the resolved resource (particularly on certain errors), these conditions are also applied to the desired resource since both variables point to the same object. This causes the status patch operation to fail detecting any differences, preventing condition updates from being persisted.

With these changes, we will start returning the copy of desired object if the object returned
by the controllers is nil.
If not, we will continue use the returned object.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

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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
verify-attribution	b25caa9	link	false	/test verify-attribution
sqs-controller-test	b25caa9	link	true	/test sqs-controller-test
sagemaker-controller-test	b25caa9	link	true	/test sagemaker-controller-test
ec2-controller-test	b25caa9	link	true	/test ec2-controller-test
unit-test	b25caa9	link	true	/test unit-test
ecr-controller-test	b25caa9	link	true	/test ecr-controller-test
iam-controller-test	b25caa9	link	true	/test iam-controller-test
s3-controller-test	b25caa9	link	true	/test s3-controller-test

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