[bitnami/mongodb] feat: :sparkles: Add password update job

[javsalgar]

Description of the change

In this PR we add a new feature, a password update job. This job uses helm hooks to update the mongodb passwords. This is disabled by default.

Benefits

Better password management

Possible drawbacks

Unexpected corner cases

Applicable issues

• fixes #

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/] Descriptive title
• [ ] All commits signed off and in agreement of Developer Certificate of Origin (DCO)