Expose pre-built Prism binaries for Linux on Darwin on every Prism release

[egiurleo]

Until now, we have built Prism in Sorbet's build pipeline using Bazel. However, building Prism requires Ruby. We cannot specify environment variables to get Bazel to use the correct Ruby on its host system, and we don't want to maintain an entire Ruby build within the Sorbet build pipeline just to build Prism.

As a workaround, we want to build Prism and share the pre-built binaries on every Prism release so we can pull those binaries into the Sorbet build pipeline and use Prism without having Ruby available.

[egiurleo]

ruby/prism#3272