After ApplyOverrides/reformat(), need IDs are already fully-qualified
(matching ReleaseToID format). The previous name-based lookup could
select the wrong dependency when multiple releases share the same name
across namespaces/kubecontexts.
Also adds a cross-namespace test case to verify correct behavior when
releases share names across different namespaces.
Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>
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