(IMAGES-1334) Add support for macOS 12

[AriaXLi]

No description provided.

[codecov]

Codecov Report

Merging #245 (23359d3) into master (08f6074) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##           master    #245      +/-   ##
=========================================
- Coverage    0.52%   0.52%   -0.01%     
=========================================
  Files          14      14              
  Lines        2477    2485       +8     
=========================================
  Hits           13      13              
- Misses       2464    2472       +8     

Impacted Files	Coverage Δ
lib/beaker-hostgenerator/data.rb	0.00% <0.00%> (ø)

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[joshcooper]

Hi @ekohl @bastelfreak our team is taking over for night's watch, so let us know if there's something we should be doing differently.

Also I found yaml/libyaml#46 which explains why sometimes the fixtures have a trailing space for expected_exception: \n. Hopefully that version of libyaml will be released in a ruby version and we can standardize on omitting the trailing space, so the output is stable.

[bastelfreak]

@joshcooper looks good to me. if you review PRs you can also add the appropriate bug/enhancement/backwards-inconpatible label.