Adds configs logging_add_custom_attributes, logging_drop_attribute_fb_input

[TeonLucas]

Support for more compact logging metadata in newrelic-infra.yml

# Adds custom_attributes to fluent-bit forwarder tags.
logging_add_custom_attributes: true

# Drop fb.input from fluent-bit forwarder tags.
logging_drop_attribute_fb_input: true

Use in conjunction with enrichmentDisabled in logging pipeline

[CLAassistant]

All committers have signed the CLA.

[jsubirat]

(discussing internally in Logging team)