[bitnami/etcd] fixed tls enable handling and v3 environment variable support for defrag cronjob

[sachinphogat]

Description of the change

1. Modified Environment Variables in Defrag Cronjob to for etcdctl v3 as previously specified were only supported by etcdctl v2 and defrag cronjob was not able to use them.
2. Added changing endpoints to have https:// instead of http:// if tls is enabled in defrag cronjob

• Fixes [bitnami/etcd] Defrag Job TLS Flags & Endpoint URL Issue #31255

Benefits

With the above changes defrag job is created properly and able to succeed without any issues.

Checklist

• Chart version bumped in Chart.yaml according to semver. This is not necessary when the changes only affect README.md files.
• Variables are documented in the values.yaml and added to the README.md using readme-generator-for-helm
• Title of the pull request follows this pattern [bitnami/<name_of_the_chart>] Descriptive title
• All commits signed off and in agreement of Developer Certificate of Origin (DCO)

[sachinphogat]

Can we review and merge this for next patch version release?

[alvneiayu]

hi @sachinphogat

First of all, thanks a lot for your PR. Just a question about the changes, those new variables are compatible with the v2 too? just to not break the retrocompatibility.

Thanks a lot

Álvaro

[sachinphogat]

As per etcd documentations, above env variables are supported for v3 only. There are different flags for v2 and v3.
But as per all the latest containers, they are using v3 only, so ideally we should have these changes merged.