VW PQ: ACC_System & ACC_GRA_Anziege

[CineXWorm]

This merge request is about:

• Fix scaling issues
• Remove unused signals
• Add value descriptions

[CineXWorm]

@jyoung8607 I am pretty sure they would like your insight here.

[sshane]

We use all capital names for these so the parser can recognize which signals are counters/checksums

[jyoung8607]

To recap my Discord conversation with @jackking444: this PR does identify and fix a couple of signal bugs. They will have a minor impact on OP longitudinal output. Unfortunately this PR also introduces several new bugs, above and beyond just the renaming of the checksum and counter signal. So, this should not be merged as-is. I will file a superseding PR shortly.

[jyoung8607]

Following up to myself:

There are only two signals that needed to be fixed in ACC_System, fixes submitted in #791. There is only one signal (plus the message name) that needed to be fixed in ACC_GRA_Anzeige, fixes submitted in #792.

The rest of the proposed signal changes are invalid. This PR is superseded and can be closed.

[sshane]

The rest of the proposed signal changes are invalid. This PR is superseded and can be closed.

Closing per comment.