Add more debug logging to channelID test failures

[andrewhop]

Description of changes:

The GitHub Mac runners occasionally fail the Channel ID tests with an error like:

bad error (wanted ':CHANNEL_ID_SIGNATURE_INVALID:' / ''): local error 'channel ID unexpectedly negotiated', child error 'exit status 1', stdout:

This change tries to log more things to get more info to make progress debugging these failures.

Call-outs:

I wasn't able to test this code path locally because I can't get these failures to reproduce locally.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.95%. Comparing base (3263ce2) to head (f9a3764).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2130      +/-   ##
==========================================
- Coverage   78.96%   78.95%   -0.01%     
==========================================
  Files         610      610              
  Lines      105288   105288              
  Branches    14910    14910              
==========================================
- Hits        83143    83134       -9     
- Misses      21493    21502       +9     
  Partials      652      652              

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