[stable/superset] Allow to override secret by using existing one

[link-webcreations]

What this PR does / why we need it:

This PR will allow to use an existing secret file containg the init_superset.sh and superset_config.py scripts.
This is to allow users to create files/init_superset.sh and files/superset_config.py, and then use the helm templates with a custom secret file to take advantage of Helm templates.
This is not possible using values.yaml directly, because only files within the templates/ folder can.

Which issue this PR fixes

• none

Special notes for your reviewer:

• none

Checklist

• DCO signed
• Chart Version bumped
• Variables are documented in the README.md
• Title of the PR starts with chart name (e.g. [stable/chart])

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

Hi @link-webcreations. Thanks for your PR.

I'm waiting for a helm member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[bigbrozer]

That's something we are waiting for :-) We are using this chart as a dependency and would like to use our own set of secret instead of the proposed default name.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Any further update will cause the issue/pull request to no longer be considered stale. Thank you for your contributions.

[zanhsieh]

/ok-to-test

[link-webcreations]

Hello,
Did the tests run as expected ?
Thanks for your feedbacks !
Regards

[zanhsieh]

@davidkarlsen @scottrigby @jlegrone
Would you guys LGTM this PR please?

@link-webcreations
If this PR passed, would you mind to volunteer as one of this chart owners? Current this chart does not have owner. See:

#13869

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Any further update will cause the issue/pull request to no longer be considered stale. Thank you for your contributions.

[stale]

This issue is being automatically closed due to inactivity.