safety tests: add common test case for bad checksums and counters

The Honda and VW tests implement this, but it should be added to the base test suite for all safety modes. https://github.com/commaai/panda/blob/1dfee5973bc2884b61e55b7614f2fe90d0e2a1f3/tests/safety/test_honda.py#L117

Start with the checksum and counter test in tests/safety/test_honda.py around line 117, then inspect the base safety test suite and the corresponding VW test. Run the safety tests to understand their common structure; done means the case is covered for all safety modes.

Written by the indexing model from the issue text.