Fix erroneous finish on TDqInputMergeBlockStreamValue (#8834)

[spuchin]

No description provided.

[github-actions]

⚪ 2024-09-06 13:06:38 UTC Pre-commit check for 31add78 has started.
⚪ 2024-09-06 13:10:13 UTC Build linux-x86_64-release-asan is running...
🟢 2024-09-06 13:32:56 UTC Build successful.
⚪ 2024-09-06 13:33:13 UTC Tests are running...
🔴 2024-09-06 15:39:11 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
10064	9982	0	25	25	32

🟢 2024-09-06 15:40:03 UTC ydbd size 5.5 GiB changed* by +6.0 KiB, which is < 100.0 KiB vs stable-24-3: OK

ydbd size dash	stable-24-3: 1bb608a	merge: 31add78	diff	diff %
ydbd size	5 934 627 792 Bytes	5 934 633 968 Bytes	+6.0 KiB	+0.000%
ydbd stripped size	1 487 865 920 Bytes	1 487 867 136 Bytes	+1.2 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]

⚪ 2024-09-06 13:17:03 UTC Pre-commit check for 31add78 has started.
⚪ 2024-09-06 13:19:43 UTC Build linux-x86_64-release-clang14 is running...
🟢 2024-09-06 13:58:38 UTC Build successful.

[github-actions]

⚪ 2024-09-06 13:20:09 UTC Pre-commit check for 31add78 has started.
⚪ 2024-09-06 13:23:13 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2024-09-06 14:00:18 UTC Build successful.
⚪ 2024-09-06 14:00:34 UTC Tests are running...
🔴 2024-09-06 15:49:33 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
38595	33345	0	4	5215	31

🟢 2024-09-06 15:50:13 UTC ydbd size 8.2 GiB changed* by +3.1 KiB, which is < 100.0 KiB vs stable-24-3: OK

ydbd size dash	stable-24-3: 1bb608a	merge: 31add78	diff	diff %
ydbd size	8 760 905 424 Bytes	8 760 908 640 Bytes	+3.1 KiB	+0.000%
ydbd stripped size	478 998 152 Bytes	478 998 472 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}