1541 UUID bytes support for 16 byte strings / BINARY(16)

[shawnwall]

Change Summary

• Updated UUID validation to take into account 16 byte strings per python documentation
• Created new test for this byte string type

Related issue number

Fixes #1541

Checklist

• Unit tests for the changes exist
• Tests pass on CI and coverage remains at 100%
• Documentation reflects the changes where applicable
• changes/<pull request or issue id>-<github username>.md file added describing change
  (see [changes/README.md]

[codecov]

Codecov Report

Merging #1542 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master     #1542   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           21        21           
  Lines         3772      3775    +3     
  Branches       749       749           
=========================================
+ Hits          3772      3775    +3     

Impacted Files	Coverage Δ
pydantic/validators.py	100.00% <100.00%> (ø)

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[StephenBrown2]

This looks good to me. @samuelcolvin what are your thoughts on the documentation bit?

[samuelcolvin]

This is great, thank you. I'll merge it as soon as I've run through the older PRs.