Update setup-build-environment to use NP-637 branch

Changed the GitHub action reference to the NP-637 branch for testing purposes. Added a temporary `conan_config_branch` input, with a note to remove it once the branch is merged. This ensures alignment with the ongoing changes in the workflow.

NP-637

.github/workflows/conan-package.yml

@@ -28,10 +28,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup the build environment
-        uses: ultimaker/cura-workflows/.github/actions/setup-build-environment@main
+        uses: ultimaker/cura-workflows/.github/actions/setup-build-environment@NP-637
         with:
           conan_user: ${{ secrets.CONAN_USER }}
           conan_password: ${{ secrets.CONAN_PASS }}
+          conan_config_branch: NP-637  # FIXME: remove this line once merged
 
       - uses: greguintow/get-diff-action@v7
         id: get-diff