Introduce delayed restore manager and use it for views and external tables

[jepett0]

See the request for the change in this comment.

Changelog entry

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

• Dump/restore external data source #14437

[github-actions]

⚪ 2025-02-17 14:54:13 UTC Pre-commit check linux-x86_64-relwithdebinfo for c085988 has started.
⚪ 2025-02-17 14:54:20 UTC Artifacts will be uploaded here
⚪ 2025-02-17 14:56:36 UTC ya make is running...
🟢 2025-02-17 15:15:56 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1101	1087	0	0	5	9

🟢 2025-02-17 15:16:08 UTC Build successful.
🟢 2025-02-17 15:16:20 UTC ydbd size 2.1 GiB changed* by +9.5 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 0921658	merge: c085988	diff	diff %
ydbd size	2 236 254 216 Bytes	2 236 263 928 Bytes	+9.5 KiB	+0.000%
ydbd stripped size	473 847 960 Bytes	473 848 280 Bytes	+320 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]

⚪ 2025-02-17 14:55:44 UTC Pre-commit check linux-x86_64-release-asan for c085988 has started.
⚪ 2025-02-17 14:55:57 UTC Artifacts will be uploaded here
⚪ 2025-02-17 14:58:24 UTC ya make is running...
🟡 2025-02-17 15:11:33 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Details

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
685	666	0	7	6	6

⚪ 2025-02-17 15:11:48 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-02-17 15:29:33 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Details

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
25 (only retried tests)	12	0	4	3	6

⚪ 2025-02-17 15:29:41 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-02-17 15:40:40 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?
18 (only retried tests)	7	0	4	2	5

🟢 2025-02-17 15:40:47 UTC Build successful.
🟢 2025-02-17 15:41:02 UTC ydbd size 3.6 GiB changed* by -96 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 609889d	merge: c085988	diff	diff %
ydbd size	3 890 045 208 Bytes	3 890 045 112 Bytes	-96 Bytes	-0.000%
ydbd stripped size	1 361 717 056 Bytes	1 361 716 992 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}