Test caching in R2

Author: sandhose

.github/workflows/ci.yaml

@@ -16,10 +16,14 @@ concurrency:
 env:
   CARGO_TERM_COLOR: always
   CARGO_NET_GIT_FETCH_WITH_CLI: "true"
-  SCCACHE_GHA_ENABLED: "true"
+  SCCACHE_BUCKET: mas-cache-test
+  SCCACHE_ENDPOINT: https://4f82d842615ee6cdbfb633767c5e6aa3.r2.cloudflarestorage.com
+  SCCACHE_REGION: auto
   RUSTC_WRAPPER: "sccache"
   SCCACHE_ERROR_LOG: /tmp/sccache_log.txt
   SCCACHE_LOG: debug
+  AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+  AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
 
 jobs:
   opa-lint: