Distribute rustc_codegen_cranelift for arm64 macOS

Author: bjorn3

src/ci/github-actions/jobs.yml

@@ -321,6 +321,7 @@ auto:
       NO_DEBUG_ASSERTIONS: 1
       NO_OVERFLOW_CHECKS: 1
       DIST_REQUIRE_ALL_TOOLS: 1
+      CODEGEN_BACKENDS: llvm,cranelift
     <<: *job-macos-m1
 
   # This target only needs to support 11.0 and up as nothing else supports the hardware