Extend schemeshard and compatibility tests for DEFAULT columns

[dahbka-lis]

Changelog entry

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Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

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[github-actions]

🟢 2025-10-08 16:57:50 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-10-08 17:40:58 UTC Pre-commit check linux-x86_64-relwithdebinfo for 3b208a9 has started.
⚪ 2025-10-08 17:41:11 UTC Artifacts will be uploaded here
⚪ 2025-10-08 17:43:52 UTC ya make is running...
🟢 2025-10-08 17:57:10 UTC Tests successful.

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1047	1043	0	0	3	1

🟢 2025-10-08 17:57:13 UTC Build successful.
🟢 2025-10-08 17:57:24 UTC ydbd size 2.3 GiB changed* by 0 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 69a3522	merge: 3b208a9	diff	diff %
ydbd size	2 418 031 144 Bytes	2 418 031 144 Bytes	0 Bytes	0.000%
ydbd stripped size	515 031 176 Bytes	515 031 176 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]

⚪ 2025-10-08 17:41:04 UTC Pre-commit check linux-x86_64-release-asan for 3b208a9 has started.
⚪ 2025-10-08 17:41:08 UTC Artifacts will be uploaded here
⚪ 2025-10-08 17:43:48 UTC ya make is running...
🟡 2025-10-08 18:14:39 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
885	795	0	16	73	1

🟢 2025-10-08 18:14:42 UTC Build successful.
🟢 2025-10-08 18:14:57 UTC ydbd size 3.7 GiB changed* by -96 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 69a3522	merge: 3b208a9	diff	diff %
ydbd size	4 021 828 736 Bytes	4 021 828 640 Bytes	-96 Bytes	-0.000%
ydbd stripped size	1 494 064 512 Bytes	1 494 064 448 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}