adjust the llc partition consuming metric reporting logic

[zhtaoxiang]

Adjust the llc partition consuming metric reporting logic to make it a little bit more consistent.

Currently, the llc partition consuming metric is reported as 1 when

1. the kafka consumer reads some messages, or
2. when the kafka consumer has been idle for a predefined time.

The second condition is confusing because

1. why would we report 0 for llc partition consuming metric initially and then change it to 1 just because of some time elapses?
2. This also causes bugs if we rely on this metric to create alerts

To make the report logic to be consistent, we now report llc partition consuming metric as 1 as long as kafka consumer is trying to consume messages

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.76%. Comparing base (59551e4) to head (c096685).
Report is 107 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #12627      +/-   ##
============================================
+ Coverage     61.75%   61.76%   +0.01%     
+ Complexity      207      198       -9     
============================================
  Files          2436     2453      +17     
  Lines        133233   133823     +590     
  Branches      20636    20753     +117     
============================================
+ Hits          82274    82660     +386     
- Misses        44911    45049     +138     
- Partials       6048     6114      +66     

Flag	Coverage Δ
custom-integration1	<0.01% <0.00%> (-0.01%)	⬇️
integration	<0.01% <0.00%> (-0.01%)	⬇️
integration1	<0.01% <0.00%> (-0.01%)	⬇️
integration2	0.00% <0.00%> (ø)
java-11	61.73% <100.00%> (+0.02%)	⬆️
java-21	61.65% <100.00%> (+0.02%)	⬆️
skip-bytebuffers-false	61.75% <100.00%> (+<0.01%)	⬆️
skip-bytebuffers-true	61.63% <100.00%> (+33.90%)	⬆️
temurin	61.76% <100.00%> (+0.01%)	⬆️
unittests	61.76% <100.00%> (+0.01%)	⬆️
unittests1	46.91% <100.00%> (+0.02%)	⬆️
unittests2	27.67% <0.00%> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.