Unstable tests after CI upgrading

[const-t]

• t_stress.test_stress.TestRequestsUnderCtrlFrameFlood now seems unstable, need to investigate it.
• t_custom_branges.test_http_brange.TestConfigParsing.test_enable_0x00_0x0a_0x0d_between fails time to time
• t_stress.test_stress.TlsWrkStressDocker.test_concurrent_connections false report memleak
• t_leaks fails in CI Fixed in fix unstable tests #861

./run_tests.py t_custom_branges.test_http_brange.TestConfigParsing.test_enable_0x00_0x0a_0x0d_between
File tests_resume.json not found
Root privileges are required: need access to module loading on localhost.

----------------------------------------------------------------------
Running functional tests...
----------------------------------------------------------------------

t_custom_branges.test_http_brange.TestConfigParsing.test_enable_0x00_0x0a_0x0d_between ... FAIL

======================================================================
FAIL: t_custom_branges.test_http_brange.TestConfigParsing.test_enable_0x00_0x0a_0x0d_between
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/parameterized/parameterized.py", line 620, in standalone_func
    return func(*(a + p.args), **p.kwargs, **kw)
  File "/home/const/tempesta-test/t_custom_branges/test_http_brange.py", line 96, in test_enable_0x00_0x0a_0x0d
    with self.assertRaises(
AssertionError: ProcessBadExitStatusException not raised : Tempesta config parser allowed 0x00 | 0x0a | 0x0d bytes with 'http_qetoken_brange'.

----------------------------------------------------------------------