CI: use namespace.so (#31056)

* namespace

* mkdir

* fix

* restore only

* restore

* v3
old-commit-hash: 9ee0a8a2b1abb01eeaca7aa9de5fa86ee60a59e9

.github/workflows/setup-with-retry/action.yaml

@@ -5,10 +5,6 @@ inputs:
     description: 'Auth token for Docker Hub, required for BuildJet jobs'
     required: false
     default: ''
-  cache_key_prefix:
-    description: 'Prefix for caching key'
-    required: false
-    default: 'scons_x86_64'
   sleep_time:
     description: 'Time to sleep between retries'
     required: false
@@ -22,7 +18,6 @@ runs:
       continue-on-error: true
       with:
         docker_hub_pat: ${{ inputs.docker_hub_pat }}
-        cache_key_prefix: ${{ inputs.cache_key_prefix }}
         is_retried: true
     - if: steps.setup1.outcome == 'failure'
       shell: bash
@@ -33,7 +28,6 @@ runs:
       continue-on-error: true
       with:
         docker_hub_pat: ${{ inputs.docker_hub_pat }}
-        cache_key_prefix: ${{ inputs.cache_key_prefix }}
         is_retried: true
     - if: steps.setup2.outcome == 'failure'
       shell: bash
@@ -43,5 +37,4 @@ runs:
       uses: ./.github/workflows/setup
       with:
         docker_hub_pat: ${{ inputs.docker_hub_pat }}
-        cache_key_prefix: ${{ inputs.cache_key_prefix }}
         is_retried: true