Expand cfg for operator storage impl

[jdygert-spok]

Previously, trying to build with only e.g. gha feature enabled would not compile.

[sylvestre]

could you please add a github job to check we don't regress in the future? thanks

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (cf59584) 30.63% compared to head (16ce2ba) 30.66%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2007      +/-   ##
==========================================
+ Coverage   30.63%   30.66%   +0.03%     
==========================================
  Files          51       51              
  Lines       19564    19564              
  Branches     9454     9454              
==========================================
+ Hits         5993     6000       +7     
+ Misses       7905     7902       -3     
+ Partials     5666     5662       -4     

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[jdygert-spok]

Sure, which would you rather?

1. Add single feature variants to existing build matrix
2. Add job that runs cargo check with each single feature variant manually
3. Use cargo-all-features to run check-all-features on each combination of features

[jdygert-spok]

Seems like maybe 2 makes the most sense here.

[sylvestre]

sounds good, the matrix github action system should be good enough :)

[sylvestre]

I guess you saw

Run cargo check --no-default-features --feature gcs
error: unexpected argument '--feature' found