Fix log message in GenerateCookie (#8890)

[Alek5andr-Kotov]

Changelog entry

Changes from PR #8890

Binary data is displayed in the log instead of the partition id. Example from the log

... partition id ^@" code: BAD_REQUEST sessionId: ...

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

...

[github-actions]

⚪ 2025-03-05 07:30:06 UTC Pre-commit check for ef8ebbc has started.
⚪ 2025-03-05 07:32:48 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2025-03-05 08:12:42 UTC Build successful.
⚪ 2025-03-05 08:12:59 UTC Tests are running...
🔴 2025-03-05 09:41:34 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
14788	13429	0	20	1302	37

🟢 2025-03-05 09:42:49 UTC ydbd size 8.3 GiB changed* by -22.4 KiB, which is <= 0 Bytes vs stable-24-4: OK

ydbd size dash	stable-24-4: b39b6d2	merge: ef8ebbc	diff	diff %
ydbd size	8 897 593 640 Bytes	8 897 570 680 Bytes	-22.4 KiB	-0.000%
ydbd stripped size	484 989 160 Bytes	484 988 712 Bytes	-448 Bytes	-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]

⚪ 2025-03-05 07:30:27 UTC Pre-commit check for ef8ebbc has started.
⚪ 2025-03-05 07:33:36 UTC Build linux-x86_64-release-asan is running...
🟢 2025-03-05 07:56:22 UTC Build successful.
⚪ 2025-03-05 07:56:40 UTC Tests are running...
🔴 2025-03-05 10:15:46 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
10374	10234	0	68	31	41

🟢 2025-03-05 10:16:43 UTC ydbd size 5.6 GiB changed* by -16.6 KiB, which is <= 0 Bytes vs stable-24-4: OK

ydbd size dash	stable-24-4: b39b6d2	merge: ef8ebbc	diff	diff %
ydbd size	6 027 011 560 Bytes	6 026 994 520 Bytes	-16.6 KiB	-0.000%
ydbd stripped size	1 508 306 592 Bytes	1 508 305 760 Bytes	-832 Bytes	-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}