feat(TableService): Support SNAPSHOT_RW (SNAPSHOT READ-WRITE isolation mode) in TableClient

[nvamelichev]

I don't know if YDB TableService supports SNAPSHOT_RW (the proto API says it should...)

But at least those using YDB QueryService via a TableClient wrapper tech.ydb.query.impl.TableClientImpl, e.g. YOJ, should be able to access SNAPSHOT_RW mode. This PR adds support for just that.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.56%. Comparing base (597ebc0) to head (ea79b83).

Files with missing lines	Patch %	Lines
...ain/java/tech/ydb/table/transaction/TxControl.java	0.00%	11 Missing ⚠️
...c/main/java/tech/ydb/table/impl/TxControlToPb.java	0.00%	6 Missing ⚠️
...main/java/tech/ydb/query/impl/TableClientImpl.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #606      +/-   ##
============================================
- Coverage     68.65%   68.56%   -0.09%     
+ Complexity     3096     3095       -1     
============================================
  Files           355      355              
  Lines         15305    15322      +17     
  Branches       1624     1627       +3     
============================================
- Hits          10508    10506       -2     
- Misses         4131     4149      +18     
- Partials        666      667       +1     

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