Add GSC to crater

[rsheeter]

Rev is just latest from https://github.com/googlefonts/googlesans-code/commits/main/

[chrissimpkins]

We can make the directory path update. I reached out to @belluzj today to see what we need to do in the CI build workflow to accommodate this path change.

@MariannaPaszkowska for future reference, we should begin to use sources regularly for our source directory paths to support the crater requirements here.

[cmyr]

And to clarify, we expect sources because that is what is used in the google-fonts-project-template: https://github.com/googlefonts/googlefonts-project-template/blob/main/sources/config.yaml

[chrissimpkins]

https://github.com/googlefonts/googlesans-code/pull/78/files

[anthrotype]

wouldn't it be hilarious if, by the time we do add GSC to fontc_crater, we don't even see it listed because the "output is identical" already 😄

[rsheeter]

wouldn't it be hilarious if, by the time we do add GSC to fontc_crater, we don't even see it listed because the "output is identical" already 😄

I believe that's expected rofl.