Add per-tx inflight counter to tablets and fix follower per-tx counters

[snaury]

Changelog entry

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Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

Add per-tx inflight to tablet counters. Additionally it looks like followers historically didn't update per-tx counters when they should have, and there may have been a bug with per-tx counters on follower promotion.

Fixes #15567.

[github-actions]

⚪ 2025-03-11 11:01:45 UTC Pre-commit check linux-x86_64-release-asan for 8eacd84 has started.
⚪ 2025-03-11 11:01:49 UTC Artifacts will be uploaded here
⚪ 2025-03-11 11:05:10 UTC ya make is running...
🟡 2025-03-11 12:56:53 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?
13827	13603	0	178	12	34

⚪ 2025-03-11 12:58:11 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-03-11 13:14:21 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?
317 (only retried tests)	179	0	100	7	31

⚪ 2025-03-11 13:14:34 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-03-11 13:32:53 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?
216 (only retried tests)	110	0	68	6	32

🟢 2025-03-11 13:33:04 UTC Build successful.
🟢 2025-03-11 13:33:38 UTC ydbd size 3.7 GiB changed* by +1.9 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 4880f2d	merge: 8eacd84	diff	diff %
ydbd size	3 998 881 392 Bytes	3 998 883 288 Bytes	+1.9 KiB	+0.000%
ydbd stripped size	1 389 593 896 Bytes	1 389 596 264 Bytes	+2.3 KiB	+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]

🟢 2025-03-11 14:27:51 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-03-11 11:04:51 UTC Pre-commit check linux-x86_64-relwithdebinfo for 8eacd84 has started.
⚪ 2025-03-11 11:05:06 UTC Artifacts will be uploaded here
⚪ 2025-03-11 11:08:23 UTC ya make is running...
🟡 2025-03-11 12:38:43 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?
28243	25659	0	2	2466	116

⚪ 2025-03-11 12:41:06 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-03-11 12:53:32 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
162 (only retried tests)	54	0	0	0	108

🟢 2025-03-11 12:53:44 UTC Build successful.
🟢 2025-03-11 12:54:07 UTC ydbd size 2.1 GiB changed* by +2.3 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 4880f2d	merge: 8eacd84	diff	diff %
ydbd size	2 296 125 704 Bytes	2 296 128 088 Bytes	+2.3 KiB	+0.000%
ydbd stripped size	480 730 208 Bytes	480 731 040 Bytes	+832 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}