ci: add CodSpeed workflow and pytest-codspeed for performance testing (#4350)

.github/workflows/codspeed.yml

@@ -0,0 +1,29 @@
+name: Run benchmarks
+
+on:
+  push:
+    branches:
+      - "main" # or "master"
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  codspeed:
+    name: Run benchmarks
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version:
+          - "3.12"
+    steps:
+      - name: Check out the code at a specific ref
+        uses: actions/checkout@v4
+      - name: "Setup Environment"
+        uses: ./.github/actions/setup-uv
+      - name: Run benchmarks
+        uses: CodSpeedHQ/action@v3
+        with:
+            token: ${{ secrets.CODSPEED_TOKEN }}
+            run: make unit_tests args="--codspeed -n auto"
+      - name: Minimize uv cache
+        run: uv cache prune --ci