SKIP UPGRADE: Fluentbit CI Changes

General MR

Summary

Overrides the default Fluentbit inputs. In effect Fluentbit will only tail logs from the Flux containers.

Note that this absolutely results in less logs being scraped. We should only place this in CI test values where we don't care about persisting all the logs of a disposable CI cluster. Also important, we do not lose any ability to get logs in the DEBUG output, since that runs kubectl logs and would not look at FLB at all.