ci: remove setup-python step (uv manages its own Python)

uv can download and manage Python installations itself, so we don't need
the separate setup-python step. This simplifies the workflow to just 4 steps
in the upload job: delete assets, checkout, install uv, build, upload.

Co-Authored-By: AJ Steers <aj@airbyte.io>

Author: devin-ai-integration[bot]

.github/workflows/release-drafter.yml

@@ -59,11 +59,6 @@ jobs:
         with:
           version: "latest"
 
-      - name: Set up Python
-        uses: actions/setup-python@v6
-        with:
-          python-version: "3.12"
-
       - name: Build package
         env:
           UV_DYNAMIC_VERSIONING_BYPASS: ${{ needs.update_release_draft.outputs.version }}