Use 1.2 floating tag for operand image

[alebedev87]

latest is mirrored from main branch, release-1.2 should rely on the corresponding floating tag.

[openshift-ci]

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[openshift-ci]

@alebedev87: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-aws-shared-vpc-phz-operator	ba5b964	link	true	/test e2e-aws-shared-vpc-phz-operator

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