Remove need for AWS credentials

[ejm714]

Small change to set no-sign-request to True for downloading the landcover map so that a user does not need to have AWS credentials configured.

[render]

Your Render PR Server URL is https://cyfi-pr-130.onrender.com.

Follow its progress at https://dashboard.render.com/static/srv-clictul8td7s73er5k5g.

[codecov]

Codecov Report

Merging #130 (7500a8c) into main (ebdf47e) will not change coverage.
The diff coverage is 50.0%.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #130   +/-   ##
=====================================
  Coverage   75.0%   75.0%           
=====================================
  Files         12      12           
  Lines        860     860           
=====================================
  Hits         645     645           
  Misses       215     215           

Files	Coverage Δ
cyfi/data/features.py	50.0% <50.0%> (ø)

[ejm714]

@pjbull I looked at the uses of AnyPath and corrected one to Path which was a type hint. The other uses of AnyPath are in the (unsupported) experiment module and these make sense since it's reasonable to let people / us use private buckets for csvs for those.

[pjbull]

@ejm714 ok looks great! Just confirming that you tested this with your creds file moved and ensured it worked as expected?

[ejm714]

Just confirming that you tested this with your creds file moved and ensured it worked as expected?

Yep!