feat(datadog): allow bundling unspecified events

[gabedos]

What this PR does / why we need it:

This adds an option to the datadog chart to enabled the bundle_unspecified_events setting for the kubernetes apiserver check. When enabled along with unbundleEvents, events that are not specified in collectedEventTypes will be bundled. Related agent config

Note: this is a duplicate of #1683. Just needed some lint fixes.

Special notes for your reviewer:

QA via agent configcheck and noted

=== kubernetes_apiserver check ===
Configuration provider: file
Configuration source: file:/etc/datadog-agent/conf.d/kubernetes_apiserver.yaml
Config for instance ID: kubernetes_apiserver:ad9a65b57804d691
bundle_unspecified_events: true

Checklist

• Chart Version bumped
• Documentation has been updated with helm-docs (run: .github/helm-docs.sh)
• CHANGELOG.md has been updated
• Variables are documented in the README.md

[gabedos]

Not exposing this feature publicly yet. Unfinished items internally.