Fixes for compatibility with future pyuvdata

[bhazelton]

Fixes a few places for compatibility with the upcoming changes to telescope metadata.

[steven-murray]

This is all good -- when we require pyuvdata 3 we can remove some lines.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 97.05%. Comparing base (0229ba1) to head (8a92b92).

Files	Patch %	Lines
hera_qm/firstcal_metrics.py	75.00%	1 Missing ⚠️
hera_qm/utils.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #459      +/-   ##
==========================================
- Coverage   97.10%   97.05%   -0.06%     
==========================================
  Files          11       11              
  Lines        3527     3533       +6     
==========================================
+ Hits         3425     3429       +4     
- Misses        102      104       +2     

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[steven-murray]

Thanks a bunch @bhazelton!