[bitnami/redis] feat: Add external access service for redis sentinel

[unkls]

Description of the change

• Implement external Access for redis-sentinel using Loadbalancer service
• Add new values for managing new external service
• Update script start sentinel and start node to use external IP
• Update configmap sentinel and

Benefits

New feature for redis chart, that will allow externalAccess using Loadbalancer IP. Same as redis-cluster chart.

Possible drawbacks

None as the change is backward compatible, and previous users can continue using the chart without any issues.

Applicable issues

Additional information

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)

[unkls]

I'll fix the signed missing
Signed-off-by: Benjamin Leveque [email protected]

[clement0210]

Hello,
Same needs in my side to be able to use Sentinel behind a Ingress controller on cilium CNI. Really appreciated this contribution 🙏

[dgomezleon]

LGTM. Thanks for this great contribution!

[unkls]

Thanks @dgomezleon for the review ! Could you review it once again ? As I understand the changelog.md was updated by another PR merging