[1.0.0] Expose Fluentd config without ENV vars - take 3

[samjsong]

Description

After much delay, seems we're finally ready for the major release. A lot had changed since #330 so I re-did the PR to avoid mistakes. Hopefully the commit-by-commit read is a lot cleaner this time, I learned a lot from the previous two attempts 😅

The changes detailed in #333 are still valid, namely

1. Re-organized values.yaml for usability
2. Remove the use of ENV vars to get rid of that layer of indirection
3. Deprecate certain configs in the kubernetes_sumologic plugin
4. Expose Fluentd's config to Helm users

Testing performed

• ci/build.sh
• Redeploy fluentd and fluentd-events pods
• Confirm events, logs, and metrics are coming in

[vsinghal13]

LGTM! Thanks Sam! :)

[frankreno]

LGTM - Nice work! Will we add a migration doc in another PR?