change error format for http handlers

[adameat]

Changelog entry

change format of errors from text/plain to application/json

Changelog category

• Improvement
• Not for changelog (changelog entry is not required)

[github-actions]

⚪ 2024-07-03 12:21:34 UTC Pre-commit check for afa4580 has started.
⚪ 2024-07-03 12:24:38 UTC Build linux-x86_64-release-asan is running...
🟢 2024-07-03 12:48:52 UTC Build successful.
⚪ 2024-07-03 12:49:05 UTC Tests are running...
🔴 2024-07-03 14:53:50 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
11026	10446	0	86	322	172

🟡 2024-07-03 14:54:43 UTC ydbd size 5.4 GiB changed* by +259.6 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: bd87563	merge: afa4580	diff	diff %
ydbd size	5 814 908 560 Bytes	5 815 174 376 Bytes	+259.6 KiB	+0.005%
ydbd stripped size	1 247 931 016 Bytes	1 247 971 784 Bytes	+39.8 KiB	+0.003%

^{*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]

⚪ 2024-07-03 12:37:11 UTC Pre-commit check for afa4580 has started.
⚪ 2024-07-03 12:40:07 UTC Build linux-x86_64-release-clang14 is running...
🟢 2024-07-03 12:46:37 UTC Build successful.

[github-actions]

⚪ 2024-07-03 12:44:11 UTC Pre-commit check for afa4580 has started.
⚪ 2024-07-03 12:46:52 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2024-07-03 13:26:50 UTC Build successful.
⚪ 2024-07-03 13:27:05 UTC Tests are running...
🔴 2024-07-03 15:04:31 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
15302	13983	0	1	1304	14

🟡 2024-07-03 15:05:09 UTC ydbd size 8.3 GiB changed* by +398.5 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: bd87563	merge: afa4580	diff	diff %
ydbd size	8 926 807 928 Bytes	8 927 215 952 Bytes	+398.5 KiB	+0.005%
ydbd stripped size	486 814 568 Bytes	486 826 152 Bytes	+11.3 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}