Changes:
- fd9b0cd aws: check AWS EC2 IMDSv2 client error
- cdb89f0 in_systemd: backport 'lowercase' option (#4992)
- de69a6a in_tail: on file rotation, remove entry from hash tables
- 93ec4da cmake: backport jemalloc changes (#5025)
- 18213d7 out_loki: reduce accessor noise
- 3d8d1d7 dockerfiles: remove duplicates and update README (#4973)
- e396c82 appveyor: backport updates to build td-agent-bit (#4962)
- 360670a out_cloudwatch_logs: fix build issue from #4826
- d36af1f out_cloudwatch_logs: Only create log group if it does not already exist to prevent throttling
New container image is available fluent/fluent-bit:1.8.14