Revert greedy fetch in GraceJoinCore and use of GraceJoinCore for Map-Broadcast

[Hor911]

• Not for changelog (changelog entry is not required)

[github-actions]

⚪ 2025-03-07 10:27:25 UTC Pre-commit check linux-x86_64-relwithdebinfo for e18f2bb has started.
⚪ 2025-03-07 10:27:56 UTC Artifacts will be uploaded here
⚪ 2025-03-07 10:31:25 UTC ya make is running...
🟡 2025-03-07 11:44:13 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
26147	23544	0	3	2458	142

⚪ 2025-03-07 11:46:58 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-03-07 12:08:50 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
204 (only retried tests)	74	0	0	0	130

🟢 2025-03-07 12:09:01 UTC Build successful.
🟢 2025-03-07 12:09:20 UTC ydbd size 2.1 GiB changed* by -240 Bytes, which is <= 0 Bytes vs stable-25-1: OK

ydbd size dash	stable-25-1: 97bd83c	merge: e18f2bb	diff	diff %
ydbd size	2 242 294 464 Bytes	2 242 294 224 Bytes	-240 Bytes	-0.000%
ydbd stripped size	474 900 792 Bytes	474 900 728 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]

⚪ 2025-03-07 10:27:55 UTC Pre-commit check linux-x86_64-release-asan for e18f2bb has started.
⚪ 2025-03-07 10:28:09 UTC Artifacts will be uploaded here
⚪ 2025-03-07 10:30:59 UTC ya make is running...
🟡 2025-03-07 11:48:41 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?
11927	11804	0	59	24	40

⚪ 2025-03-07 11:50:03 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-03-07 12:11:35 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?
175 (only retried tests)	133	0	2	5	35

⚪ 2025-03-07 12:11:43 UTC ya make is running... (failed tests rerun, try 3)
🟢 2025-03-07 12:41:49 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
71 (only retried tests)	35	0	0	0	36

🟢 2025-03-07 12:41:56 UTC Build successful.
🟢 2025-03-07 12:42:27 UTC ydbd size 3.6 GiB changed* by -560 Bytes, which is <= 0 Bytes vs stable-25-1: OK

ydbd size dash	stable-25-1: 97bd83c	merge: e18f2bb	diff	diff %
ydbd size	3 900 523 008 Bytes	3 900 522 448 Bytes	-560 Bytes	-0.000%
ydbd stripped size	1 365 157 264 Bytes	1 365 156 944 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}