refactor 'ydb scheme rmdir' implementation

[jepett0]

Changelog entry

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

refactoring + tests

Also fixed some bugs:

• We attempted deleting the subdomain if the --path . was specified, so the ydb scheme rmdir would always result in an error previously in this case.
• We haven't ordered the deletions of external data sources and external tables (the former must be deleted after the latter). It could have led to an error in ydb scheme rmdir if it got to the external data source first.
• Straight (non-reverse) order of scheme objects to remove on cleanup on failed restore. This prevented deletion of directories. We have received errors always in this case.

+ deduplicated code by using the generic RemovePathRecursive on cleanup after a failed restore

[github-actions]

🟢 2025-03-26 13:36:58 UTC The validation of the Pull Request description is successful.

[CyberROFL]

#16232 (comment)

[github-actions]

⚪ 2025-03-28 10:58:05 UTC Pre-commit check linux-x86_64-release-asan for 13af832 has started.
⚪ 2025-03-28 10:58:09 UTC Artifacts will be uploaded here
⚪ 2025-03-28 11:00:52 UTC ya make is running...
🟡 2025-03-28 12:15:45 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
12430	12276	0	111	8	35

⚪ 2025-03-28 12:17:16 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-03-28 12:35:05 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
213 (only retried tests)	147	0	33	4	29

⚪ 2025-03-28 12:35:20 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-03-28 12:48:55 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
93 (only retried tests)	32	0	32	4	25

🟢 2025-03-28 12:49:05 UTC Build successful.
🟢 2025-03-28 12:49:41 UTC ydbd size 3.8 GiB changed* by -96 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 9fb5600	merge: 13af832	diff	diff %
ydbd size	4 119 149 616 Bytes	4 119 149 520 Bytes	-96 Bytes	-0.000%
ydbd stripped size	1 423 819 368 Bytes	1 423 819 304 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]

⚪ 2025-03-28 10:58:23 UTC Pre-commit check linux-x86_64-relwithdebinfo for 13af832 has started.
⚪ 2025-03-28 10:58:39 UTC Artifacts will be uploaded here
⚪ 2025-03-28 11:01:36 UTC ya make is running...
🟡 2025-03-28 12:09:16 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?
26841	24187	0	2	2540	112

⚪ 2025-03-28 12:11:50 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-03-28 12:32:04 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
152 (only retried tests)	52	0	0	0	100

🟢 2025-03-28 12:32:14 UTC Build successful.
🟢 2025-03-28 12:32:34 UTC ydbd size 2.2 GiB changed* by 0 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 9fb5600	merge: 13af832	diff	diff %
ydbd size	2 347 157 296 Bytes	2 347 157 296 Bytes	0 Bytes	0.000%
ydbd stripped size	490 811 520 Bytes	490 811 520 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}