Enable sccache hits for local builds (#42)

This change passes through the value of `SCCACHE_S3_NO_CREDENTIALS` to our `conda` builds, enabling devs to utilize the `sccache` cache that's populated by CI when they are reproducing build issues locally as per [these](https://docs.rapids.ai/resources/reproducing-ci/) instructions.

Authors:
  - Jake Awe (https://github.com/AyodeAwe)

Approvers:
  - AJ Schmidt (https://github.com/ajschmidt8)
  - Peter Andreas Entschev (https://github.com/pentschev)

URL: #42

conda/recipes/ucxx/meta.yaml

@@ -30,6 +30,7 @@ build:
     - SCCACHE_S3_KEY_PREFIX=libucxx-aarch64 # [aarch64]
     - SCCACHE_S3_KEY_PREFIX=libucxx-linux64 # [linux64]
     - SCCACHE_S3_USE_SSL
+    - SCCACHE_S3_NO_CREDENTIALS
 
 requirements:
   build: