Linking IO, adding counters and logic

[wnwright]

The SDS X stage limits were not working. In this PR, the EL1084 terminal was removed, and replaced with an EL1124 and EL9505. The limit switch outputs were linked to channels 3 and 4 in the EL1124. However, the limit switches are quite noisy, so Zach suggested using a counter to filter out the noise.

Motivation and Context

https://jira.slac.stanford.edu/browse/LCLSECSD-587

How Has This Been Tested?

This has been tested with the SDS X stage, and the limits are working as expected, despite the noise clearly visible on the digital IO.

Pre-merge checklist

• [x] Code works interactively
• [x] Code contains descriptive comments
• [x] Test suite passes locally
• [x] Libraries are set to fixed versions and not Always Newest
• [x] Code committed with pre-commit (alternatively pre-commit run --all-files)

[klauer]

For pre-commit info, see here: https://confluence.slac.stanford.edu/display/PCDS/TwinCAT+3+Git+Setup+and+Best+Practices#TwinCAT3GitSetupandBestPractices-Enableaccesstopre-commitandcondaingitbash