[bitnami/grafana-operator]: feat!: 💥 Adapt to new standardizations

[javsalgar]

Description of the change

Apply standardizations to the grafana-operator chart.

Benefits

Possible drawbacks

Applicable issues

• fixes #

Additional information

Checklist

• Chart version bumped in Chart.yaml according to semver.
• Variables are documented in the README.md
• Title of the PR starts with chart name (e.g. [bitnami/<name_of_the_chart>])

[github-actions]

Great PR! Please pay attention to the following items before merging:

Files matching bitnami/*/values.yaml:

• Is the PR adding a new container? Please reviewer, add it to the models (internal process)
• Is the PR adding a new parameter? Please, ensure it’s documented in the README.md

This is an automatically generated QA checklist based on modified files

[carrodher]

@javsalgar there are other major changes in progress for this Helm chart, see #8059, I'm not sure if both changes can be synchronized or you (or the author of the other PR) will have any kind of issues when trying to put everything together

[javsalgar]

This can be closed as it is already integrated with #8059