Move some profile fetching code into a separate module

[canova]

This is the first commit of the cli PR: #5663. I thought it would be good to land the earlier commits of it, so it's going to be easier to land that one in the future. This one looks simple enough. It mostly move things around.

[codecov]

Codecov Report

❌ Patch coverage is 69.35484% with 38 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.38%. Comparing base (46e3594) to head (3a65387).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/utils/profile-fetch.ts	69.09%	34 Missing ⚠️
src/test/fixtures/utils.ts	62.50%	3 Missing ⚠️
src/actions/receive-profile.ts	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5939      +/-   ##
==========================================
- Coverage   85.45%   85.38%   -0.07%     
==========================================
  Files         321      322       +1     
  Lines       32068    32101      +33     
  Branches     8745     8850     +105     
==========================================
+ Hits        27403    27410       +7     
- Misses       4234     4260      +26     
  Partials      431      431              

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