chore(ci): Update integration dockerfile for updated image setup

[paleolimbot]

The image (from Arrow) seems to use a non-base environment and conda run was not setting the correct environment for compilers. The location of Arrow C++ also seems to have changed to being installed in the image.

Fixes #859.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.44%. Comparing base (f11d517) to head (b6a3df8).
⚠️ Report is 38 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #876      +/-   ##
==========================================
- Coverage   79.96%   79.44%   -0.53%     
==========================================
  Files         105      106       +1     
  Lines       15461    15881     +420     
  Branches     1738     1834      +96     
==========================================
+ Hits        12364    12616     +252     
- Misses       1998     2115     +117     
- Partials     1099     1150      +51     

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