[BE] Move git config setup to checkout action

Not sure why it was duplicated between build and test in the first place

And let's use the same set of setting across all repos

.github/actions/checkout-pytorch/action.yml

@@ -23,6 +23,17 @@ runs:
       id: check_container_runner
       run: echo "IN_CONTAINER_RUNNER=$(if [ -f /.inarc ] || [ -f /.incontainer ]; then echo true ; else echo false; fi)" >> "$GITHUB_OUTPUT"
 
+      - name: Enable git long paths and symlinks on Windows and disable fsmonitor daemon
+        shell: bash
+        run: |
+          git config --global core.longpaths true
+          git config --global core.symlinks true
+          git config --global core.ignorecase false
+
+          # https://git-scm.com/docs/git-fsmonitor--daemon.  The daemon could lock
+          # the directory on Windows and prevent GHA from checking out as reported
+          # in https://github.com/actions/checkout/issues/1018
+          git config --global core.fsmonitor false
     - name: Set up parallel fetch and clean workspace
       id: first-clean
       continue-on-error: true

.github/workflows/_win-build.yml

@@ -71,18 +71,6 @@ jobs:
       run:
         shell: bash
     steps:
-      # Duplicated in win-test because this MUST go before a checkout
-      - name: Enable git long paths and symlinks on Windows and disable fsmonitor daemon
-        shell: bash
-        run: |
-          git config --global core.longpaths true
-          git config --global core.symlinks true
-          git config --global core.ignorecase false
-
-          # https://git-scm.com/docs/git-fsmonitor--daemon.  The daemon could lock
-          # the directory on Windows and prevent GHA from checking out as reported
-          # in https://github.com/actions/checkout/issues/1018
-          git config --global core.fsmonitor false
 
       - name: Clean up leftover processes on non-ephemeral Windows runner
         uses: pytorch/test-infra/.github/actions/cleanup-runner@main

.github/workflows/_win-test.yml

@@ -64,19 +64,6 @@ jobs:
       run:
         shell: bash
     steps:
-      # Duplicated in win-build because this MUST go before a checkout
-      - name: Enable git long paths and symlinks on Windows and disable fsmonitor daemon
-        shell: bash
-        run: |
-          git config --global core.longpaths true
-          git config --global core.symlinks true
-          git config --global core.ignorecase false
-
-          # https://git-scm.com/docs/git-fsmonitor--daemon.  The daemon could lock
-          # the directory on Windows and prevent GHA from checking out as reported
-          # in https://github.com/actions/checkout/issues/1018
-          git config --global core.fsmonitor false
-
       - name: Clean up leftover processes on non-ephemeral Windows runner
         uses: pytorch/test-infra/.github/actions/cleanup-runner@main