sysview: add access for database admins

[ijon]

Give database admins the same unlimited rights to view system views about users, groups, and their permissions as cluster admins have.

For the ordinary users:

• .sys/auth_groups and .sys/auth_group_members are closed
• .sys/auth_users is filtered to show only the user himself

Cluster admins and now database admins do not have those restrictions.

Stacked on:

• tests: support testenv setup in non-anonymous mode #15130

[github-actions]

🟢 2025-02-27 12:12:56 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-02-27 15:23:54 UTC Pre-commit check linux-x86_64-release-asan for 83b963f has started.
⚪ 2025-02-27 15:24:09 UTC Artifacts will be uploaded here
⚪ 2025-02-27 15:27:12 UTC ya make is running...
🟡 2025-02-27 16:35:39 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?
11992	11817	0	114	30	31

⚪ 2025-02-27 16:37:39 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-02-27 16:49:28 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?
253 (only retried tests)	218	0	5	2	28

⚪ 2025-02-27 16:49:39 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-02-27 17:01:29 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?
61 (only retried tests)	33	0	1	0	27

🟢 2025-02-27 17:01:40 UTC Build successful.
🟡 2025-02-27 17:02:08 UTC ydbd size 3.7 GiB changed* by +185.1 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: c5b2980	merge: 83b963f	diff	diff %
ydbd size	3 985 411 216 Bytes	3 985 600 776 Bytes	+185.1 KiB	+0.005%
ydbd stripped size	1 387 765 576 Bytes	1 387 814 280 Bytes	+47.6 KiB	+0.004%

^{*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]

⚪ 2025-02-27 15:29:01 UTC Pre-commit check linux-x86_64-relwithdebinfo for 83b963f has started.
⚪ 2025-02-27 15:29:07 UTC Artifacts will be uploaded here
⚪ 2025-02-27 15:31:52 UTC ya make is running...
🟡 2025-02-27 16:20:11 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?
19494	18147	0	4	1215	128

⚪ 2025-02-27 16:22:24 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-02-27 16:35:04 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
192 (only retried tests)	66	0	0	0	126

🟢 2025-02-27 16:35:16 UTC Build successful.
🟢 2025-02-27 16:35:35 UTC ydbd size 2.1 GiB changed* by +84.2 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: c5b2980	merge: 83b963f	diff	diff %
ydbd size	2 286 685 160 Bytes	2 286 771 432 Bytes	+84.2 KiB	+0.004%
ydbd stripped size	479 417 824 Bytes	479 428 896 Bytes	+10.8 KiB	+0.002%

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