tests(vpc): add test and doc for filtering by vpc_id in datasource

[yfodil]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.64%. Comparing base (dec6d7e) to head (013edc7).
⚠️ Report is 609 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2360      +/-   ##
==========================================
- Coverage   73.65%   73.64%   -0.01%     
==========================================
  Files         226      226              
  Lines       35018    35017       -1     
==========================================
- Hits        25791    25790       -1     
  Misses       7010     7010              
  Partials     2217     2217              

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