Don't use random scan cookie for build index

[MBkkt]

We shouldn't use random cookie for build index scans. Because in such case it's possible that this random id will intersects with real transaction id. So we use invalid zero id. It's allowed because build index scans don't need some external finalize. New build index scan remove old scan from manager because it has newer version

[github-actions]

⚪ 2024-11-05 08:56:22 UTC Pre-commit check linux-x86_64-release-asan for 6d7c5cd has started.
⚪ 2024-11-05 08:56:33 UTC Artifacts will be uploaded here
⚪ 2024-11-05 08:59:31 UTC ya make is running...
🟡 2024-11-05 10:07:48 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
9242	9174	0	26	9	33

🟢 2024-11-05 10:08:39 UTC Build successful.
🟢 2024-11-05 10:09:19 UTC ydbd size 5.7 GiB changed* by -1.4 KiB, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 7672737	merge: 6d7c5cd	diff	diff %
ydbd size	6 150 333 736 Bytes	6 150 332 328 Bytes	-1.4 KiB	-0.000%
ydbd stripped size	1 535 125 648 Bytes	1 535 125 328 Bytes	-320 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]

⚪ 2024-11-05 08:56:46 UTC Pre-commit check linux-x86_64-relwithdebinfo for 6d7c5cd has started.
⚪ 2024-11-05 08:56:57 UTC Artifacts will be uploaded here
⚪ 2024-11-05 09:00:04 UTC ya make is running...
🟡 2024-11-05 09:48:24 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
15313	13806	0	2	1404	101

⚪ 2024-11-05 09:49:42 UTC ya make is running... (failed tests rerun, try 2)
🟢 2024-11-05 10:01:37 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
101 (only retried tests)	6	0	0	0	95

🟢 2024-11-05 10:01:44 UTC Build successful.
🟢 2024-11-05 10:02:05 UTC ydbd size 2.8 GiB changed* by -768 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 7672737	merge: 6d7c5cd	diff	diff %
ydbd size	3 039 362 384 Bytes	3 039 361 616 Bytes	-768 Bytes	-0.000%
ydbd stripped size	481 619 384 Bytes	481 619 192 Bytes	-192 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}