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

[ssmike]

Changelog entry

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

Changelog category

• Bugfix

[github-actions]

⚪ 2024-09-09 16:57:06 UTC Pre-commit check for 81aa1ff has started.
⚪ 2024-09-09 17:00:04 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2024-09-09 17:39:41 UTC Build successful.
⚪ 2024-09-09 17:39:52 UTC Tests are running...
🔴 2024-09-09 19:32:55 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
38450	33212	0	6	5218	14

🟢 2024-09-09 19:33:34 UTC ydbd size 8.3 GiB changed* by 0 Bytes, which is <= 0 Bytes vs stable-24-3-7-hotfix: OK

ydbd size dash	stable-24-3-7-hotfix: 33b9933	merge: 81aa1ff	diff	diff %
ydbd size	8 877 438 032 Bytes	8 877 438 032 Bytes	0 Bytes	0.000%
ydbd stripped size	481 177 128 Bytes	481 177 192 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}

[github-actions]

⚪ 2024-09-09 16:58:07 UTC Pre-commit check for 81aa1ff has started.
⚪ 2024-09-09 17:01:03 UTC Build linux-x86_64-release-clang14 is running...
🟢 2024-09-09 17:10:05 UTC Build successful.

[github-actions]

⚪ 2024-09-09 17:01:31 UTC Pre-commit check for 81aa1ff has started.
⚪ 2024-09-09 17:04:35 UTC Build linux-x86_64-release-asan is running...
🟢 2024-09-09 17:26:32 UTC Build successful.
⚪ 2024-09-09 17:26:46 UTC Tests are running...
🔴 2024-09-09 19:32:23 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
9917	9853	0	23	28	13

🟢 2024-09-09 19:33:05 UTC ydbd size 5.6 GiB changed* by 0 Bytes, which is <= 0 Bytes vs stable-24-3-7-hotfix: OK

ydbd size dash	stable-24-3-7-hotfix: 33b9933	merge: 81aa1ff	diff	diff %
ydbd size	6 008 663 456 Bytes	6 008 663 456 Bytes	0 Bytes	0.000%
ydbd stripped size	1 493 718 624 Bytes	1 493 718 624 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}