New workflow_dispatch for building wheels for a PR

.github/workflows/build_wheels_for_pr.yml

@@ -0,0 +1,28 @@
+name: Build and Upload Wheels for PR
+
+on:
+  workflow_dispatch:
+
+jobs:
+
+  check_for_pr:
+    runs-on: ubuntu-latest
+    outputs:
+      PR_NUMBER: ${{ steps.get_pr.outputs.PR_NUMBER }}
+    steps:
+      - name: Check if commit belongs to a PR
+        id: get_pr
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          pr_number=$(curl --silent --header "Authorization: Bearer ${GITHUB_TOKEN}" \
+            --url "https://api.github.com/repos/${GITHUB_REPOSITORY}/commits/${GITHUB_SHA}/pulls" \
+            | jq '.[] | .number')
+
+          if [ -z "$pr_number" ]; then
+            echo "No PR associated with this commit"
+            exit 1
+          else
+            echo "Commit is associated with PR: $pr_number"
+            echo "PR_NUMBER=$pr_number" >> "$GITHUB_OUTPUTS"
+          fi