BLD: Correct gcsfs install on Azure

[gfyoung]

Follow-up #26352

Also realized that the gcsfs install was placed in the wrong place (needs to be placed after the activate command). However, you will notice then that the install is the culprit for the earlier 3.7 build failures (something is not right on conda-forge and / with gcsfs and 3.7). Note though that the install of gcsfs works just fine on 3.6.

[jreback]

can u make an issue for follow up on this as well (or can just repurpose the closed one)

[codecov]

Codecov Report

Merging #26358 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #26358      +/-   ##
==========================================
+ Coverage   92.04%   92.04%   +<.01%     
==========================================
  Files         175      175              
  Lines       52289    52289              
==========================================
+ Hits        48130    48131       +1     
+ Misses       4159     4158       -1

Flag	Coverage Δ
#multiple	90.59% <ø> (ø)	⬆️
#single	40.87% <ø> (+0.01%)	⬆️

Impacted Files	Coverage Δ
pandas/util/testing.py	90.7% <0%> (+0.1%)	⬆️

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[codecov]

Codecov Report

Merging #26358 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #26358      +/-   ##
==========================================
+ Coverage   92.04%   92.04%   +<.01%     
==========================================
  Files         175      175              
  Lines       52289    52289              
==========================================
+ Hits        48130    48131       +1     
+ Misses       4159     4158       -1

Flag	Coverage Δ
#multiple	90.59% <ø> (ø)	⬆️
#single	40.87% <ø> (+0.01%)	⬆️

Impacted Files	Coverage Δ
pandas/util/testing.py	90.7% <0%> (+0.1%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4e4f5bd...dddcfd2. Read the comment docs.

[jreback]

thanks @gfyoung

[WillAyd]

Interestingly enough this is still throwing the Malformed error during CI:

https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=11454&view=logs&jobId=76104ccd-8dcc-5006-a17c-28bcdd709542&taskId=abfb9918-2617-5bb0-6d25-709630145a2e&lineStart=941&lineEnd=942&colStart=1&colEnd=1

Though builds are coming out green. Maybe something with our gcsfs coverage we need to look into?

[gfyoung]

gcsfs is an optional dependency. Thus, we skip any tests (which there are some) that require this library if it isn’t installed.