[bitnami/redis] Add option to change port name in master service

[cwgthornton]

Description of the change

Lets you specify the port.name in the service for the redis master service.

Benefits

If your kube instance requires the port's name to match the targetPort value, you can now use this chart.

Possible drawbacks

Not aware of any

Applicable issues

• fixes [bitnami/redis] Ability to rename redis service port name #25228

Additional information

NA

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)

[dgomezleon]

Hi @cwgthornton

Thanks for contributing. I added some minor suggestions to follow the same approach as RabbitMQ.

[dgomezleon]

LGTM. Thanks