feat: DIA-1996: remove sync kafka library

[matt-bernstein]

Don't want to support 2 different libraries' formats for SSL, so to simplify implementation, use aiokafka for everything

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 12.50000% with 21 lines in your changes missing coverage. Please review.

Project coverage is 70.01%. Comparing base (a20f2e6) to head (bb57fca).

Files with missing lines	Patch %	Lines
server/utils.py	12.50%	21 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #374      +/-   ##
==========================================
- Coverage   70.23%   70.01%   -0.23%     
==========================================
  Files          51       51              
  Lines        2980     2991      +11     
==========================================
+ Hits         2093     2094       +1     
- Misses        887      897      +10     

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