Cleanup HLC code

[navina]

Follow-up for #11017 where we removed support for high/stream level consumers in Apache Pinot. This PR makes the following changes:

• Deletes the kafka and pulsar stream level connectors
• Removes HLRealtimeSegmentDataManager and support for it in RealtimeTableDataManager
• Made pinot-spi changes in StreamConsumerFactory#createStreamLevelConsumer to throw UnsupportedException by default

[codecov-commenter]

Codecov Report

❌ Patch coverage is 81.25000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.50%. Comparing base (d6b1b4f) to head (1560d7b).
⚠️ Report is 3481 commits behind head on master.

Files with missing lines	Patch %	Lines
...ata/manager/realtime/RealtimeTableDataManager.java	86.66%	1 Missing and 1 partial ⚠️
...apache/pinot/spi/stream/StreamConsumerFactory.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             master   #11326       +/-   ##
=============================================
+ Coverage      0.11%   68.50%   +68.39%     
- Complexity        0     6536     +6536     
=============================================
  Files          2239     2233        -6     
  Lines        120424   119927      -497     
  Branches      18215    18183       -32     
=============================================
+ Hits            137    82161    +82024     
+ Misses       120267    31931    -88336     
- Partials         20     5835     +5815     

Flag	Coverage Δ
integration1	21.04% <75.00%> (?)
integration1temurin11	?
integration1temurin17	?
integration1temurin20	?
integration2	25.64% <75.00%> (?)
integration2temurin11	?
integration2temurin17	?
integration2temurin20	?
java-11	68.39% <81.25%> (?)
java-17	68.30% <81.25%> (?)
java-20	68.28% <81.25%> (?)
temurin	68.50% <81.25%> (?)
unittests1	67.33% <12.50%> (?)
unittests1temurin17	?
unittests1temurin20	?
unittests2	14.66% <0.00%> (?)
unittests2temurin11	?
unittests2temurin17	?
unittests2temurin20	?

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[xiangfu0]

LGTM