feat: add rdkafka2 plugin

[onecer]

fix: kube-logging/logging-operator#1373

[pepov]

@onecer I've made some updates to be able to go with the least possible change radius.

[pepov]

Also the way I update the gemfile locks is the following: I run the build locally and copy out the updated lock file from the container to be able to compare changes in an architecture independent way:

docker build . -t fluentd:v1.16
docker run --rm -ti fluentd:v1.16 cat Gemfile.outputs.lock > outputs/Gemfile.lock.internal
# do the diff

the requested changes have been addressed

[pepov]

fyi we have a few ambigous deps now, could be interesting in case we face any issues

aws-eventstream (1.3.0, 1.2.0)
aws-partitions (1.896.0, 1.851.0)
aws-sdk-core (3.191.3, 3.186.0)
aws-sdk-sqs (1.67.0, 1.64.0)
aws-sigv4 (1.8.0, 1.6.1)
base64 (0.2.0, default: 0.1.1)
bigdecimal (3.1.6, default: 3.1.3, 1.4.4)
bundler (2.5.15, default: 2.4.19)
concurrent-ruby (1.3.3, 1.2.3, 1.1.10)
domain_name (0.6.20231109, 0.5.20190701)
drb (2.2.1, default: 2.1.1)
faraday (2.7.12, 1.10.3)
faraday-excon (2.1.0, 1.1.0)
faraday-net_http (3.0.2, 1.0.1)
fluent-plugin-record-modifier (2.2.0, 2.1.1)
fluent-plugin-sumologic_output (1.9.0, 1.8.0)
fluentd (1.16.3, 1.16.2)
google-protobuf (3.25.3, 3.21.12)
http (5.1.1, 4.4.1)
kubeclient (4.10.1, 4.9.3)
minitest (5.22.2, 5.16.3)
mutex_m (0.2.0, default: 0.1.2)
net-imap (0.4.2, 0.3.4.1)
net-smtp (0.4.0, 0.3.4)
prometheus-client (4.2.2, 4.2.1)
racc (1.8.0, default: 1.6.2)
timeout (0.4.0, default: 0.3.1)
tzinfo-data (1.2024.1, 1.2023.4, 1.2023.3)

[pepov]

sorry, I realized, this should only be introduced with logging operator version 4.9, which means we only want to add this plugin to v1.16-4.9 which is not yet created.

[pepov]

I've created a separate PR to implement the changes in a new image version, I would prefer that one to be merged: #142

[onecer]

I've created a separate PR to implement the changes in a new image version, I would prefer that one to be merged: #142

Great