Expose fluent-bit configurations

[frankreno]

There may be needs to fine tune the fluent-bit configuration and it should be possible to do so (eg multiline processing)

[perk-sumo]

Exposing Fluent Bit conf seems reasonable but using it for multiline processing does not provide much value as those lines will be spit again when written to STDOUT.

[sumo-drosiek]

@SumoLogic/open-source-collection-team What do you think is better solution for this issue?

1. Expose only inputs configuration (handling specific file from configMap)
2. expose full configuration (mounting configMap as directory)

As this is advanced feature I would go with the second option

[kasia-kujawa]

at this moment it is possible to overwrite sidecar configuration, see: https://github.com/SumoLogic/tailing-sidecar/blob/441c87117408eecd2c8a4ca6d8b72c074cc6058a/helm/tailing-sidecar-operator/values.yaml#L52C1-L62C16