skip github-pages environment when build-only is true

The environment protection rules block PR branches from deploying,
which causes the test workflows to fail even though deploy steps are
skipped. Make the environment declaration conditional on build-only.

Author: chrisdicaprio

.github/workflows/python-deploy-docs-uv.yml

@@ -52,9 +52,7 @@ concurrency:
 
 jobs:
   deploy:
-    environment:
-        name: github-pages
-        url: ${{ steps.deployment.outputs.page_url }}
+    environment: ${{ !inputs.build-only && 'github-pages' || '' }}
     runs-on: ubuntu-latest
     timeout-minutes: ${{ inputs.timeout-minutes }}
     defaults:

.github/workflows/python-deploy-docs.yml

@@ -52,9 +52,7 @@ concurrency:
 
 jobs:
   deploy:
-    environment:
-        name: github-pages
-        url: ${{ steps.deployment.outputs.page_url }}
+    environment: ${{ !inputs.build-only && 'github-pages' || '' }}
     runs-on: ubuntu-latest
     timeout-minutes: ${{ inputs.timeout-minutes }}
     defaults: