DEV: Added ST4K4 to the veto devices.

[ghalym]

Description

Added ST4K4 In and Out status to Veto device

Motivation and Context

TMO wants to Veto faults and arbitration for devices downstream of the ST4K4 photon terminator when it is in.

How Has This Been Tested?

Not yet!

Where Has This Been Documented?

In the Code.

Pre-merge checklist

• [ ] Libraries are set to Always Newest version (Library, *)
• [ ] Code works interactively
• [ ] Code contains descriptive comments
• [ ] Test suite passes locally
• [ ] Committed with pre-commit or ran pre-commit run --all-files
• [ ] Check that BP_IO parameters weren't modified unintentionally

[ghalym]

Does this need a corresponding update in another project to report the stopper status?

The diff looks good to me. I also double-checked that MAX_VETO_DEVICES is greater than our total count here (it is, 16>8)

Yes, making changes on the K arbiter, there is a WIP pull request on the kfe-arbiter. Still need to add the PMPS_PRE inputs to read the ST4K4.

[ZLLentz]

Good call on consistent stopper interfacing