ci: update runner (#6237)

.github/workflows/build-test-distribute-flavor.yml

@@ -119,7 +119,7 @@ jobs:
   build:
     if: inputs.build_image
     name: Build ${{ inputs.framework }}-cuda${{ inputs.cuda_version }}-${{ inputs.platform }}
-    runs-on: prod-builder-v2
+    runs-on: prod-builder-v3
     outputs:
       target_tag_plain: ${{ steps.calculate-target-tag.outputs.target_tag_plain }}
     env:
@@ -129,11 +129,6 @@ jobs:
         uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955  # v4.3.0
         with:
           lfs: true
-      - name: Set up Python
-        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 #v6.2.0
-        with:
-          python-version: '3.12'
-          pip-install: jinja2 pyyaml
       - name: Calculate extra tags with platform suffix # will get redundant upon multi arch builds support
         id: extra-tags
         shell: bash