Use correct conda environment in GitHub Actions workflow.
Add python-snappy to the pudl-catalog conda environment.
Add gcsfs to package dependencies.
Add msgpack to package dependencies, even though in theory it should already be
getting installed because it's a dependency of intake. Not sure what's going on there.
Maybe @martindurant knows?
Use the google storage location for the catalog by default if none is set by the user.
Refer to the top level package constants for the known data locations elsewhere in the
package.
Re-write the tests to just use a small amount of remote data.
Fix extras in tox.ini to refer to "tests" not "test"