security: add more database admin actions tests

[ijon]

Add more tests on database admin actions in tenant database for mode enable_strict_user_management+domain_login_only.
Proper functional tests, which were impossible to do for that mode until recently.

Depends on:

• security: fix password change for themself #16119

[github-actions]

🟢 2025-03-25 11:03:16 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-03-25 11:04:04 UTC Pre-commit check linux-x86_64-relwithdebinfo for 77639ad has started.
⚪ 2025-03-25 11:04:20 UTC Artifacts will be uploaded here
⚪ 2025-03-25 11:06:42 UTC ya make is running...
🟢 2025-03-25 11:15:53 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
140	132	0	0	2	6

🟢 2025-03-25 11:16:03 UTC Build successful.
🟡 2025-03-25 11:16:15 UTC ydbd size 2.2 GiB changed* by +139.4 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: 70be00c	merge: 77639ad	diff	diff %
ydbd size	2 321 084 280 Bytes	2 321 227 056 Bytes	+139.4 KiB	+0.006%
ydbd stripped size	485 261 312 Bytes	485 297 344 Bytes	+35.2 KiB	+0.007%

^{*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]

⚪ 2025-03-25 11:04:32 UTC Pre-commit check linux-x86_64-release-asan for 77639ad has started.
⚪ 2025-03-25 11:04:48 UTC Artifacts will be uploaded here
⚪ 2025-03-25 11:07:06 UTC ya make is running...
🟢 2025-03-25 11:08:49 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
13	13	0	0	0	0

🟢 2025-03-25 11:08:59 UTC Build successful.
🟡 2025-03-25 11:09:12 UTC ydbd size 3.8 GiB changed* by +226.0 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: 70be00c	merge: 77639ad	diff	diff %
ydbd size	4 083 249 072 Bytes	4 083 480 544 Bytes	+226.0 KiB	+0.006%
ydbd stripped size	1 410 852 488 Bytes	1 410 958 120 Bytes	+103.2 KiB	+0.007%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}