CodeChecker crahes while searching for the diag-tool

[dkrupp]

There should be a normal hard error in this case, not a crash

CodeChecker checkers
WARNING 2024-10-21 16:37] - 'diagtool' can not be found next to the clang binary (/usr/bin/ccache)!
Traceback (most recent call last):
  File "/local/workspace/codechecker/build/CodeChecker/lib/python3/codechecker_common/cli.py", line 208, in main
    sys.exit(args.func(args))
  File "/local/workspace/codechecker/build/CodeChecker/lib/python3/codechecker_analyzer/cmd/checkers.py", line 607, in main
    __print_checkers(args, cl)
  File "/local/workspace/codechecker/build/CodeChecker/lib/python3/codechecker_analyzer/cmd/checkers.py", line 475, in __print_checkers
    checker_info = __get_detailed_checker_info(args, cl)
  File "/local/workspace/codechecker/build/CodeChecker/lib/python3/codechecker_analyzer/cmd/checkers.py", line 228, in __get_detailed_checker_info
    analyzer_config_map = analyzer_types.build_config_handlers(
  File "/local/workspace/codechecker/build/CodeChecker/lib/python3/codechecker_analyzer/analyzers/analyzer_types.py", line 258, in build_config_handlers
    config_handler = supported_analyzers[ea].construct_config_handler(args)
  File "/local/workspace/codechecker/build/CodeChecker/lib/python3/codechecker_analyzer/analyzers/clangtidy/analyzer.py", line 691, in construct_config_handler
    checkers = ClangTidy.get_analyzer_checkers()
  File "/local/workspace/codechecker/build/CodeChecker/lib/python3/codechecker_analyzer/analyzers/clangtidy/analyzer.py", line 289, in get_analyzer_checkers
    for warning in get_warnings())
  File "/local/workspace/codechecker/build/CodeChecker/lib/python3/codechecker_analyzer/analyzers/clangtidy/analyzer.py", line 151, in get_warnings
    environment = analyzer_context.get_context().get_env_for_bin(diagtool_bin)
  File "/local/workspace/codechecker/build/CodeChecker/lib/python3/codechecker_analyzer/analyzer_context.py", line 207, in get_env_for_bin
    bin_path = Path(binary).resolve()
  File "/usr/lib/python3.8/pathlib.py", line 1042, in __new__
    self = cls._from_parts(args, init=False)
  File "/usr/lib/python3.8/pathlib.py", line 683, in _from_parts
    drv, root, parts = self._parse_args(args)
  File "/usr/lib/python3.8/pathlib.py", line 667, in _parse_args
    a = os.fspath(a)
TypeError: expected str, bytes or os.PathLike object, not NoneType