Do not pull the latest version of builder when testing

When testing, pulling the latest version makes the whole test kinda
pointless, as the last version currently published gets tested instead
of the just built one. Add a new argument so we can still reuse the same
builder action, but skip pulling to reuse the freshly built builder.

.github/workflows/test.yml

@@ -46,3 +46,4 @@ jobs:
             --${{ matrix.architecture }} \
             --target /data \
             --generic ${{ github.sha }}
+          no-pull: true

action.yml

@@ -5,6 +5,10 @@ inputs:
     description: "Arguments passed to the builder"
     required: true
     default: "--help"
+  no-pull:
+    description: "Do not pull the latest version of builder (for testing)"
+    required: false
+    default: false
 runs:
   using: "composite"
   steps:
@@ -23,6 +27,7 @@ runs:
         echo "version=${input}" >> "$GITHUB_OUTPUT"
 
     - shell: bash
+      if: ${{ inputs.no-pull == true }}
       run: |
         docker pull ghcr.io/home-assistant/amd64-builder:${{ steps.version.outputs.version }}
         cosign verify \