Fix helm install when using docker inmutable tags

[davidcaste]

Why is this pull request needed and what does it do?

A bug was introduced in release v1.37.2 that made helm fail when using a docker inmutable tag as v1.12.0@sha256:40384aa1f5ea6bfdc77997d243aec73da05f27aed0c5e9d65bfa98933c519d97. This happened because there are some restrictions documented in kubernetes labels (documentation), e.g. a length of 63 characters, only alphanumeric and _, - and . characters.

This PR attempts to fix the problem described above. Some filters were added to filter out the invalid characters present in a docker inmutable label (@ and :), and the length truncated to 63 characters.

Which issues (if any) are related?

• helm install or upgrade fails when using inmutable tags #191

Checklist:

• I have bumped the chart version according to versioning.
• I have updated the chart changelog with all the changes that come with this pull request according to changelog.
• Any new values are backwards compatible and/or have sensible default.
• I have signed off all my commits as required by DCO.

Changes are automatically published when merged to main. They are not published on branches.

Note on DCO

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