feat: disable default helm labels

[darkweaver87]

Description

While many people might use this chart to install aws load balancer on their K8S with helm, some others might want to use this chart to only generate their yaml files with helm template and let CD solutions (ArgoCD, FluxCD, etc) deploy it. Thus, this PR let this people remove helm default labels in order to add, for instance, their own app.kubernetes.io/managed-by one. Inspired by https://github.com/cert-manager/cert-manager/blob/master/deploy/charts/cert-manager/templates/_helpers.tpl#L155.

Checklist

• [ ] Added tests that cover your change (if possible)
• [x] Added/modified documentation as required (such as the README.md, or the docs directory)
• [x] Manually tested
• [x] Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! :exploding_head:

• [ ] Backfilled missing tests for code in same general area :tada:
• [ ] Refactored something and made the world a better place :star2:

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: darkweaver87 / name: Rémi BUISSON (15135d4cd4c2ee53d7883c0785578b82cfe84563, 2484205e8db055b76143ee64eb41b9a0d24fcc22)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @darkweaver87. Thanks for your PR.

I'm waiting for a kubernetes-sigs 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.

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: darkweaver87 Once this PR has been reviewed and has the lgtm label, please assign m00nf1sh for approval. For more information see the Kubernetes Code Review Process.

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[k8s-ci-robot]

PR needs rebase.

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[oliviassss]

/ok-to-test @darkweaver87, sorry for the delay, this change lgtm, can you rebase the main? also please put the manual test you've done in the PR description. Thanks

[darkweaver87]

Thanks @oliviassss, rebase done :-)

[oliviassss]

/lgtm /approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: darkweaver87, oliviassss

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The pull request process is described here

Needs approval from an approver in each of these files:

• ~~OWNERS~~ [oliviassss]

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment