update selfhost runner logic

Author: sandeepgupta12

.github/workflows/_linux-build.yml

@@ -107,7 +107,7 @@ jobs:
     environment: ${{ github.ref == 'refs/heads/main' && 'scribe-protected' || startsWith(github.ref, 'refs/heads/release/') && 'scribe-protected' || contains(github.event.pull_request.labels.*.name, 'ci-scribe') && 'scribe-pr' || '' }}
     # Don't run on forked repos
 
-    runs-on: ${{ inputs.runner_prefix}}${{ inputs.runner }}${{ fromJson(inputs.runner-ppc64le) }}
+    runs-on: ${{ inputs.runner_prefix}}${{ inputs.runner }}${{ inputs.runner-ppc64le }}
 
     timeout-minutes: 240
     outputs:

.github/workflows/ppc64le.yml

@@ -39,4 +39,6 @@ jobs:
     with:
       build-environment: linux-ppc64le-binary-manywheel
       docker-image-name: pytorch-ppc64le:ubi9.3
-      runner-ppc64le: '["self-hosted", "Linux", "ppc64le"]'
+      runner_prefix: 'self-hosted,'  # Example prefix
+      runner: 'Linux,'               # Example runner
+      runner-ppc64le: 'ppc64le'      # Specific architecture