fix(connector): set kafka consumer group id in config

[yufansong]

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What's changed and what's your intention?

Currently we forget to use properties.group.id this filed. We will auto generate a new for consumer according this line

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[codecov]

Codecov Report

Merging #13223 (89f6af1) into main (8b58861) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main   #13223      +/-   ##
==========================================
- Coverage   68.13%   68.12%   -0.02%     
==========================================
  Files        1515     1515              
  Lines      257111   257113       +2     
==========================================
- Hits       175191   175155      -36     
- Misses      81920    81958      +38     

Flag	Coverage Δ
rust	68.12% <0.00%> (-0.02%)	⬇️

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Files	Coverage Δ
src/connector/src/source/kafka/source/reader.rs	0.00% <0.00%> (ø)

... and 8 files with indirect coverage changes

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[tabVersion]

we always generate group.id by design.
RW use the low-level consumer API to consume each partition in each executor. Using kafka consumer group here will lead to consumption progress inconsistency between local state table and kafka broker.

[yufansong]

Discussed offline. This behaviour is expected. Closed.