Resolves #280 Add WriteAck as a result of SyncWriter operations

[Eistern]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 44.41%. Comparing base (c650f95) to head (146168d).
⚠️ Report is 786 commits behind head on master.

Files with missing lines	Patch %	Lines
...src/main/java/tech/ydb/topic/write/SyncWriter.java	0.00%	2 Missing ⚠️
...java/tech/ydb/topic/write/impl/SyncWriterImpl.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #281      +/-   ##
============================================
+ Coverage     41.42%   44.41%   +2.98%     
- Complexity     1460     1571     +111     
============================================
  Files           295      297       +2     
  Lines         11363    11501     +138     
  Branches       1112     1124      +12     
============================================
+ Hits           4707     5108     +401     
+ Misses         6296     5984     -312     
- Partials        360      409      +49     

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