455.execute script

[ekuvardin]

Connected to
#455
#456

Add 4 main methods for users
executeScriptYql - execute scipt using new ScriptingProtos (Can be discussed)
executeScript - execure scipt using query
waitForScript - wait for execute script
fetchScriptResults - fetch results for script

Also call to executeScript and fetchScriptResults under the hood consists of UNARY call and can't be converted to QueryStream

[codecov-commenter]

Codecov Report

❌ Patch coverage is 74.21875% with 33 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.21%. Comparing base (3b6d6e6) to head (1c48a51).
⚠️ Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
...java/tech/ydb/query/tools/SessionRetryContext.java	33.33%	13 Missing and 1 partial ⚠️
...src/main/java/tech/ydb/query/impl/SessionImpl.java	76.92%	5 Missing and 4 partials ⚠️
...in/java/tech/ydb/query/result/OperationResult.java	50.00%	5 Missing ⚠️
...tech/ydb/query/settings/ExecuteScriptSettings.java	84.00%	4 Missing ⚠️
...ery/src/main/java/tech/ydb/query/QuerySession.java	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #541      +/-   ##
============================================
+ Coverage     61.63%   62.21%   +0.58%     
- Complexity     2323     2393      +70     
============================================
  Files           329      334       +5     
  Lines         13560    13877     +317     
  Branches       1355     1385      +30     
============================================
+ Hits           8358     8634     +276     
- Misses         4564     4590      +26     
- Partials        638      653      +15     

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