Adding epicsArchVerify to epicsArchChecker

[KaushikMalapati]

Description

Adding a switch to run epicsArchVerify in epicsArchChecker, and running it by default for lcls2 hutches.

Motivation and Context

https://jira.slac.stanford.edu/browse/ECS-6632

How Has This Been Tested?

Interactively

Where Has This Been Documented?

Updated readme and file comments

[silkenelson]

This looks good to me now and I'll refer to @tangkong et al for a more technical review

[tangkong]

Reading the JIra ticket, I thought the intended behavior was:

if LCLS2_HUTCH:
    run epicsArchVerify
elif LCLS1_HUTCH:
    run epicsArchChecker

It seems that this runs both for LCLS2Hutches. The above is what Chris O'Grady suggested in the ticket. Have we confirmed that we don't miss anything by running just epicsArchVerify?

[silkenelson]

@tangkong thank you for the quick check: Kaushik did check if epicsArchVerify finds everything that epicsArchChecker does and it does not, so we can't easily do as originally suggested. For now, we are going with 'this is better' and will deal with the duplication of checks in a future release, mainly as we'd need to decide where the full check is supposed to live (engineering_tools or the DAQ release) and opinions on the correct solution may differ.