Revert "24-4: Add CleanupEC2MetadataClient()"

[CyberROFL]

Reverts #15382

[github-actions]

⚪ 2025-03-17 13:12:01 UTC Pre-commit check for c9a8d3a has started.
⚪ 2025-03-17 13:15:26 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2025-03-17 14:21:31 UTC Build successful.
⚪ 2025-03-17 14:21:46 UTC Tests are running...
🔴 2025-03-17 16:22:43 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
40374	35082	0	26	5220	46

🟢 2025-03-17 16:23:36 UTC ydbd size 8.3 GiB changed* by -85.6 KiB, which is <= 0 Bytes vs stable-24-4: OK

ydbd size dash	stable-24-4: 85b3d16	merge: c9a8d3a	diff	diff %
ydbd size	8 898 609 496 Bytes	8 898 521 800 Bytes	-85.6 KiB	-0.001%
ydbd stripped size	485 027 272 Bytes	485 021 320 Bytes	-5.8 KiB	-0.001%

^{*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]

⚪ 2025-03-17 13:14:40 UTC Pre-commit check for c9a8d3a has started.
⚪ 2025-03-17 13:17:45 UTC Build linux-x86_64-release-asan is running...
🟢 2025-03-17 14:10:27 UTC Build successful.
⚪ 2025-03-17 14:10:46 UTC Tests are running...
🔴 2025-03-17 16:26:28 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
11690	11580	0	40	28	42

🟢 2025-03-17 16:27:26 UTC ydbd size 5.6 GiB changed* by -37.5 KiB, which is <= 0 Bytes vs stable-24-4: OK

ydbd size dash	stable-24-4: 85b3d16	merge: c9a8d3a	diff	diff %
ydbd size	6 027 674 280 Bytes	6 027 635 920 Bytes	-37.5 KiB	-0.001%
ydbd stripped size	1 508 473 088 Bytes	1 508 460 960 Bytes	-11.8 KiB	-0.001%

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