ENG-4849:get_machine_names doesn't error if machine type doesn't exist

[JMkrish]

Link to Jira: https://sightmachine.atlassian.net/browse/ENG-4849

get_machine_types API is modified to utilize utilize both source_type and source_type_clean for filtering the data.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 23.22%. Comparing base (54f2484) to head (1c6a8dd).

Files	Patch %	Lines
smsdk/client.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #74      +/-   ##
==========================================
- Coverage   23.25%   23.22%   -0.04%     
==========================================
  Files          11       11              
  Lines        1363     1365       +2     
  Branches      320      321       +1     
==========================================
  Hits          317      317              
- Misses       1046     1048       +2     

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