Skip test_11g and test_gemfiles for draft pull requests

For draft PRs, only test.yml runs to give quick feedback. The heavier
test_11g.yml and test_gemfiles.yml workflows are skipped until the PR
is marked ready for review.

Also limit push triggers to the master branch so feature branch pushes
only run CI via the pull_request event.

Follows the same pattern as rsim/oracle-enhanced#2509.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yahonda

.github/workflows/test_11g.yml

@@ -2,10 +2,14 @@ name: test_11g
 
 on:
   push:
+    branches:
+      - master
   pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
 
 jobs:
   build:
+    if: github.event_name != 'pull_request' || !github.event.pull_request.draft
 
     runs-on: ubuntu-latest
     continue-on-error: true

.github/workflows/test_gemfiles.yml

@@ -2,14 +2,18 @@ name: test_gemfiles
 
 on:
   push:
+    branches:
+      - master
   pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
 jobs:
   build:
+    if: github.event_name != 'pull_request' || !github.event.pull_request.draft
 
     runs-on: ubuntu-latest
     strategy: