bitnami/external-dns: Templatize Domain Filters/Exclusions

[seanblong]

Description of the change

Leverage the helper function, common.tplvalues.render, for domain filters and exclusions.

Benefits

For our particular use case, we're building ephemeral clusters where the cluster name becomes part of the subdomain requirement. We'd like the ability to parameterize the input to make the Helm chart a little easier to use by reducing number of overrides.

Possible drawbacks

N/A

Applicable issues

N/A

Additional information

N/A

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)

[andresbono]

LGTM! Thank you for your contribution!!