ci: env VK_LOADER_DEBUG=error,warn,info

Author: Firestar99

.github/workflows/ci.yaml

@@ -191,6 +191,8 @@ jobs:
         run: cargo test -p "difftest*" --release --no-default-features --features "use-installed-tools"
       - name: difftests
         run: cargo run -p difftests --release --no-default-features --features "use-installed-tools"
+    env:
+      VK_LOADER_DEBUG: error,warn,info
 
   # This allows us to have a single job we can branch protect on, rather than needing
   # to update the branch protection rules when the test matrix changes