Allow realtime data providers to accept non-kafka producers

[navina]

Updated the existing stream data providers like AirlineDataStream and PullRequestMergedEventsStream to accept stream producers so that we can have more examples with non-kafka data source.

[codecov-commenter]

Codecov Report

Merging #8190 (6a68580) into master (58f74ce) will increase coverage by 0.03%.
The diff coverage is 90.00%.

❗ Current head 6a68580 differs from pull request most recent head ffc3140. Consider uploading reports for the commit ffc3140 to get more accurate results

@@             Coverage Diff              @@
##             master    #8190      +/-   ##
============================================
+ Coverage     71.36%   71.39%   +0.03%     
  Complexity     4308     4308              
============================================
  Files          1623     1623              
  Lines         84356    84365       +9     
  Branches      12654    12657       +3     
============================================
+ Hits          60197    60234      +37     
+ Misses        20023    20001      -22     
+ Partials       4136     4130       -6     

Flag	Coverage Δ
integration1	28.92% <0.00%> (+0.06%)	⬆️
integration2	27.54% <0.00%> (-0.15%)	⬇️
unittests1	67.89% <ø> (+<0.01%)	⬆️
unittests2	14.18% <90.00%> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
...ntroller/helix/core/PinotHelixResourceManager.java	66.12% <90.00%> (+0.35%)	⬆️
...pinot/common/utils/fetcher/HttpSegmentFetcher.java	61.53% <0.00%> (-10.26%)	⬇️
...a/org/apache/pinot/common/utils/ServiceStatus.java	60.00% <0.00%> (-7.15%)	⬇️
...core/startree/operator/StarTreeFilterOperator.java	85.31% <0.00%> (-2.10%)	⬇️
.../pinot/server/starter/helix/BaseServerStarter.java	57.98% <0.00%> (-1.97%)	⬇️
...r/helix/SegmentOnlineOfflineStateModelFactory.java	63.20% <0.00%> (-1.89%)	⬇️
...ces/PinotSegmentUploadDownloadRestletResource.java	57.51% <0.00%> (-1.29%)	⬇️
...e/pinot/broker/broker/helix/BaseBrokerStarter.java	75.67% <0.00%> (-1.09%)	⬇️
.../pinot/core/data/manager/BaseTableDataManager.java	86.80% <0.00%> (-0.86%)	⬇️
...e/pinot/common/utils/FileUploadDownloadClient.java	63.00% <0.00%> (-0.74%)	⬇️
... and 16 more

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