tests: log_dir_removed_after_follow flacky test

tt_cmd = PosixPath('/tmp/pytest-of-runner/pytest-0/tt_build0/tt')
mock_env_dir = PosixPath('/tmp/pytest-of-runner/pytest-0/test_log_dir_removed_after_fol0')

    def test_log_dir_removed_after_follow(tt_cmd, mock_env_dir):
        cmd = [tt_cmd, 'log', '-f']
        process = subprocess.Popen(
            cmd,
            cwd=mock_env_dir,
            stderr=subprocess.STDOUT,
            stdout=subprocess.PIPE,
            text=True,
        )
    
        wait_for_lines_in_output(process.stdout,
                                 ['app0:inst0: line 19', 'app1:inst2: line 19',
                                  'app0:inst1: line 19', 'app1:inst1: line 19'])
    
        var_dir = os.path.join(mock_env_dir, 'ie')
        assert os.path.exists(var_dir)
        shutil.rmtree(var_dir)
    
        assert process.wait(2) == 0
>       assert "Failed to detect creation of" in process.stdout.read()
E       AssertionError: assert 'Failed to detect creation of' in '   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n'
E        +  where '   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n' = <built-in method read of _io.TextIOWrapper object at 0x7faca5077030>()
E        +    where <built-in method read of _io.TextIOWrapper object at 0x7faca5077030> = <_io.TextIOWrapper name=12 encoding='UTF-8'>.read
E        +      where <_io.TextIOWrapper name=12 encoding='UTF-8'> = <Popen: returncode: 0 args: [PosixPath('/tmp/pytest-of-runner/pytest-0/tt_bu...>.stdout

test/integration/log/test_log.py:278: AssertionError
=========================== short test summary info ============================
FAILED test/integration/log/test_log.py::test_log_dir_removed_after_follow - AssertionError: assert 'Failed to detect creation of' in '   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n'
 +  where '   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n   ⨯ no such file or directory\n' = <built-in method read of _io.TextIOWrapper object at 0x7faca5077030>()
 +    where <built-in method read of _io.TextIOWrapper object at 0x7faca5077030> = <_io.TextIOWrapper name=12 encoding='UTF-8'>.read
 +      where <_io.TextIOWrapper name=12 encoding='UTF-8'> = <Popen: returncode: 0 args: [PosixPath('/tmp/pytest-of-runner/pytest-0/tt_bu...>.stdout
==== 1 failed, 535 passed, 159 skipped, 10 deselected in 3973.75s (1:06:13) ====