Move suggest fixes to a separate CI workflow (#6455)

Move suggest fixes to a separate CI workflow so that it is triggered
only on PRs and does not fail the main branch.

Signed-off-by: Justin Chu <justinchu@microsoft.com>

.github/workflows/lint.yml

@@ -121,28 +121,3 @@ jobs:
             exit 1
           fi
           echo -e "::endgroup::"
-
-  auto-apply-fixes:
-    name: Suggest fixes
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      pull-requests: write
-    steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
-      - name: Setup Python
-        uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
-        with:
-          python-version: "3.10"
-      - name: Install dependencies
-        run: |
-          python -m pip install -r requirements-dev.txt
-          lintrunner init
-      - name: Run lintrunner on all files
-        run: |
-          set +e
-          lintrunner f --all-files -v
-          exit 0
-      - uses: parkerbxyz/suggest-changes@v1
-        with:
-          comment: 'You can commit the suggested changes from lintrunner.'

.github/workflows/pr_checks.yml

@@ -0,0 +1,43 @@
+# Copyright (c) ONNX Project Contributors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: PR Checks
+
+on:
+  pull_request:
+    branches:
+      - main
+
+permissions:  # set top-level default permissions as security best practice
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name == 'workflow_dispatch' }}
+  cancel-in-progress: true
+
+jobs:
+  auto-apply-fixes:
+    name: Suggest fixes
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+      - name: Setup Python
+        uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
+        with:
+          python-version: "3.10"
+      - name: Install dependencies
+        run: |
+          python -m pip install -r requirements-dev.txt
+          lintrunner init
+      - name: Run lintrunner on all files
+        run: |
+          set +e
+          lintrunner f --all-files -v
+          exit 0
+      - uses: parkerbxyz/suggest-changes@v1
+        with:
+          comment: 'You can commit the suggested changes from lintrunner.'