Fix the problem with the full package name of the proxy helm chart when tagging with tito

[avshiliaev]

What does this PR change?

In the following PR #7620 the name of the proxy helm chart was changed from proxy-helm to proxy. While the change is logical in itself, it creates errors when tagging the package with tito. In general, there're several things relevant for tito when tagging a package:

• its name in the .spec file (Chart.yml in case of a helm chart)
• the name of the .changes file in the package's dir
• the name on the rel-eng/pacakges/
• previous tags for this package

So the solution would be to either change all four parameters to proxy instead of proxy-helm here in git and only add the suffix when pushing to obs, or revert back to proxy-helm.

GUI diff

No difference.

• DONE

Documentation

• No documentation needed: only internal and user invisible changes

• DONE

Test coverage

• Not tested

• DONE

Links

Fixes #
Tracks # add downstream PR, if any

• DONE

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[deneb-alpha]

@juliogonzalez the PR looks good to me and it should solve the issue while tagging, but I would like to have a second check from you.

[deneb-alpha]

LGTM