CI: move coverage

[jreback]

closes #18895

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@ff865b4). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #18896   +/-   ##
=========================================
  Coverage          ?   91.61%           
=========================================
  Files             ?      154           
  Lines             ?    51400           
  Branches          ?        0           
=========================================
  Hits              ?    47089           
  Misses            ?     4311           
  Partials          ?        0

Flag	Coverage Δ
#multiple	89.48% <ø> (?)
#single	40.83% <ø> (?)

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