Fix reading big messages in Kafka Proxy (from #18079)

[a-serebryanskiy]

Changelog entry

Moved changes from: #18079

Issue: #18116

This PR fixes optimisation in NKikimr::NRawSocket::TBufferedWriter, that wrote the entire message directly to socket if message was larger than available space in buffer. When we wrote more than 6mb to socket with SSL enabled, it every time returned -11 (WAGAIN).
As a quick fix, we replace sending of an entire message to socket with cutting this message into 1mb chunks and sending them to socket one by one.

Changelog category

• Bugfix

Description for reviewers

...

[github-actions]

🟢 2025-05-07 09:38:48 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-05-07 12:09:50 UTC Pre-commit check linux-x86_64-release-asan for c702696 has started.
⚪ 2025-05-07 12:10:23 UTC Artifacts will be uploaded here
⚪ 2025-05-07 12:13:51 UTC ya make is running...
🟡 2025-05-07 13:27:21 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Details

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
13696	13531	0	61	70	34

⚪ 2025-05-07 13:28:30 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-05-07 13:48:46 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Details

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
206 (only retried tests)	119	0	7	48	32

⚪ 2025-05-07 13:48:54 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-05-07 14:09:12 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Test history | Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
114 (only retried tests)	33	0	7	41	33

🟢 2025-05-07 14:09:21 UTC Build successful.
🟢 2025-05-07 14:09:51 UTC ydbd size 3.6 GiB changed* by -17.8 KiB, which is <= 0 Bytes vs stable-25-1: OK

ydbd size dash	stable-25-1: 1523d35	merge: c702696	diff	diff %
ydbd size	3 911 204 256 Bytes	3 911 186 080 Bytes	-17.8 KiB	-0.000%
ydbd stripped size	1 368 049 104 Bytes	1 368 052 048 Bytes	+2.9 KiB	+0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-05-07 12:20:24 UTC Pre-commit check linux-x86_64-relwithdebinfo for c702696 has started.
⚪ 2025-05-07 12:20:31 UTC Artifacts will be uploaded here
⚪ 2025-05-07 12:23:21 UTC ya make is running...
🟡 2025-05-07 13:24:47 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
20735	19456	0	3	1212	64

⚪ 2025-05-07 13:26:27 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-05-07 13:46:44 UTC Tests successful.

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
132 (only retried tests)	68	0	0	6	58

🟢 2025-05-07 13:46:50 UTC Build successful.
🟢 2025-05-07 13:47:10 UTC ydbd size 2.1 GiB changed* by -17.9 KiB, which is <= 0 Bytes vs stable-25-1: OK

ydbd size dash	stable-25-1: 1523d35	merge: c702696	diff	diff %
ydbd size	2 248 485 552 Bytes	2 248 467 256 Bytes	-17.9 KiB	-0.001%
ydbd stripped size	475 855 800 Bytes	475 854 456 Bytes	-1.3 KiB	-0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}