Temporary workaround for "subtree" checkout errors on Windows (#383)

This switches Windows workers, which are not yet ephemeral to use
a patched version of checkouts.

This guarantees always cleaning up repo state even in case of
previous bad submodules-like repo operations done by a previous
run.

In the long run, we should be using ephemeral workers, and switch
to upstream fixed version if the PR gets merged upstream.

Upstream PR: actions/checkout#1321

b/282361986
b/258687270

.github/workflows/main_win.yaml

@@ -59,7 +59,7 @@ jobs:
       )
     steps:
       - id: Checkout
-        uses: actions/checkout@v3
+        uses: kaidokert/checkout@v3.5.999 # Temporary version
         with:
           fetch-depth: 1
           persist-credentials: false
@@ -104,7 +104,7 @@ jobs:
     runs-on: windows-2019
     steps:
       - name: Checkout files
-        uses: actions/checkout@v3
+        uses: kaidokert/checkout@v3.5.999
         with:
           fetch-depth: 2
           persist-credentials: false
@@ -138,7 +138,7 @@ jobs:
         config: [devel, debug, qa, gold]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: kaidokert/checkout@v3.5.999
         with:
           # Use fetch depth of 0 to get full history for a valid build id.
           fetch-depth: 0
@@ -173,7 +173,7 @@ jobs:
         include: ${{ fromJson(needs.initialize.outputs.includes) }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: kaidokert/checkout@v3.5.999
         with:
           fetch-depth: 1
           persist-credentials: false