Remove SBOM and provenance attestations from CI build step

Author: Copilot

.github/workflows/ci.yml

@@ -230,8 +230,6 @@ jobs:
             --tag ${{ env.REGISTRY_NAME }}/${{ matrix.image }}:${{ env.TAG }}-${PLATFORM_TAG} \
             --cache-from type=registry,ref=${{ env.REGISTRY_NAME }}/${{ matrix.image }}:latest \
             --cache-to type=inline \
-            --attest type=sbom \
-            --attest type=provenance,mode=max \
             ./${{ matrix.image }}
         env:
           REGISTRY_NAME: ${{ env.REGISTRY_NAME }}