fix(kqp): always take snapshot for queries with stream lookup (#8267)

[ulya-sidorina]

No description provided.

[github-actions]

⚪ 2024-08-27 09:45:29 UTC Pre-commit check for 6d5c07d has started.
⚪ 2024-08-27 09:48:01 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2024-08-27 10:26:43 UTC Build successful.
⚪ 2024-08-27 10:26:56 UTC Tests are running...
🔴 2024-08-27 12:07:21 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
38455	33228	0	4	5212	11

🟢 2024-08-27 12:08:03 UTC ydbd size 8.1 GiB changed* by -48 Bytes, which is <= 0 Bytes vs stable-24-3: OK

ydbd size dash	stable-24-3: 57fe08e	merge: 6d5c07d	diff	diff %
ydbd size	8 726 033 600 Bytes	8 726 033 552 Bytes	-48 Bytes	-0.000%
ydbd stripped size	476 971 592 Bytes	476 971 592 Bytes	0 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]

⚪ 2024-08-27 09:46:50 UTC Pre-commit check for 6d5c07d has started.
⚪ 2024-08-27 09:49:19 UTC Build linux-x86_64-release-clang14 is running...
🟢 2024-08-27 09:54:44 UTC Build successful.

[github-actions]

⚪ 2024-08-27 09:47:03 UTC Pre-commit check for 6d5c07d has started.
⚪ 2024-08-27 09:50:13 UTC Build linux-x86_64-release-asan is running...
🟢 2024-08-27 10:12:07 UTC Build successful.
⚪ 2024-08-27 10:12:22 UTC Tests are running...
🔴 2024-08-27 12:05:38 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
9927	9879	0	9	25	14

🟢 2024-08-27 12:06:16 UTC ydbd size 5.5 GiB changed* by -64 Bytes, which is <= 0 Bytes vs stable-24-3: OK

ydbd size dash	stable-24-3: 57fe08e	merge: 6d5c07d	diff	diff %
ydbd size	5 905 778 960 Bytes	5 905 778 896 Bytes	-64 Bytes	-0.000%
ydbd stripped size	1 480 457 728 Bytes	1 480 457 664 Bytes	-64 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}