Add DEVELOPMENT_MAINTENCE.md for Fluentd

Add development maint doc detailing how to execute a renovate process and test the package within Big Bang

added big-bang#480 as parent epic

changed the description

added fluentd kinddocs priority3 statusready-to-work teamObservability labels

set weight to 1

changed iteration to Big Bang Iterations Mar 18, 2025 - Mar 31, 2025

removed iteration Big Bang Iterations Mar 18, 2025 - Mar 31, 2025

changed iteration to Big Bang Iterations Apr 1, 2025 - Apr 14, 2025