🐛 HelmChartProxy is removed even when the release cannot be uninstalled

[dmvolod]

What this PR does / why we need it:
This PR fixes unexpected removal of the HelmChartProxy finalizer and itself in case the Helm release cannot be uninstalled.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #315

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: dmvolod
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[k8s-ci-robot]

Hi @dmvolod. Thanks for your PR.

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