bug: SDK must retry retriable grpc errors

Bug Report

YDB PHP SDK version:
latest

Environment
ubuntu18

Current behavior:

PHP Fatal error:  Uncaught YdbPlatform\Ydb\Exception: YDB Table DeleteSession (status code 14): failed to connect to all addresses; last error: 
UNKNOWN: ipv4:xx.xxx.xxx.xx:2135: tcp handshaker shutdown in /path/vendor/ydb-platform/ydb-php-sdk/src/Traits/RequestTrait.php:163#012
Stack trace:
#012#0 /path/vendor/ydb-platform/ydb-php-sdk/src/Traits/RequestTrait.php(87): YdbPlatform\Ydb\Session->checkStatus('Table', 'DeleteSession', Object(stdClass))
#012#1 /path/vendor/ydb-platform/ydb-php-sdk/src/Session.php(604): YdbPlatform\Ydb\Session->doRequest('Table', 'DeleteSession', Array)
#012#2 /path/vendor/ydb-platform/ydb-php-sdk/src/Session.php(152): YdbPlatform\Ydb\Session->request('DeleteSession', Array)
#012#3 /path/vendor/ydb-platform/ydb-php-sdk/src/Sessions/MemorySessionPool.php(23): YdbPlatform\Ydb\Session->delete()
#012#4 [internal function]: YdbPlatform\Ydb\Sessions\MemorySessionPool->__destruct()
#012#5 {main}#012  thrown in /path/vendor/ydb-platform/ydb-php-sdk/src/Traits/RequestTrait.php on line 163

Expected behavior:

php working more than 12 hours
and somehow we lost internet connection

Steps to reproduce:

php in background with simple select from ydb and disconnect of internet on it

Related code:

https://github.com/gfh31fgh2/ydb-php-simple-driver

Start in src/Traits/RequestTrait.php, especially the checkStatus and doRequest paths shown in the stack trace, and inspect how DeleteSession errors are handled. Reproduce the issue by running a simple background select and disconnecting the network. Done means retriable gRPC failures are retried so the long-running PHP process can continue.