Cache the uploader for the CircleCI orb

[thomasrockhu-codecov]

What product do you want to improve? CircleCI Orb

Is your feature request related to a problem? Please describe. It's expensive to always be downloading the orb and validating. I want to cache the file so that I can just use it. If the version changes, update the cache with the new file.

Describe the solution you'd like See above

Describe alternatives you've considered

Additional context Will likely build off of this PR

[rohan-at-sentry]

This makes sense!