Export kafka streams metrics

[ravisingal]

Currently, we add an extra container in pod for exporting JMX metrics (see span-normalizer, raw-spans-grouper helm charts). With this change, kafka streams metrics will be available out of box on admin server pod along with other JVM metrics.

we can configure level of metrics using metrics.recording.level property: https://docs.confluent.io/platform/current/streams/monitoring.html#accessing-metrics-programmatically

[codecov]

Codecov Report

Merging #26 (e8cef6b) into main (be82b63) will decrease coverage by 0.17%.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##               main      #26      +/-   ##
============================================
- Coverage     62.45%   62.28%   -0.18%     
  Complexity       58       58              
============================================
  Files            15       15              
  Lines           285      289       +4     
  Branches         24       24              
============================================
+ Hits            178      180       +2     
- Misses           94       96       +2     
  Partials         13       13              

Impacted Files	Coverage Δ	Complexity Δ
...e/core/kafkastreams/framework/KafkaStreamsApp.java	57.14% <50.00%> (-0.36%)	10.00 <0.00> (ø)

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