Support sccache

[Frederick888]

💡 Feature description

When building in docker, it'd be nice if sccache can be configured to use S3, GCS, etc as cache storage.

💻 Basic example

For example, something like this would be nice:

custom:
  rust:
    cache:
      s3Bucket: my-cache-bucket
      # not only in remote automated builds, locally I can even use minio
      s3Endpoint: http://local-minio.lan:1234