ios-ci: fix stale git lock file crash on self-hosted runner (#4120)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: louwers <649392+louwers@users.noreply.github.com>

.github/workflows/ios-ci.yml

@@ -59,9 +59,17 @@ jobs:
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
         with:
-          submodules: recursive
+          submodules: false
           persist-credentials: false
 
+      - name: Remove stale git lock files
+        run: find .git -type f -name "*.lock" -delete 2>/dev/null || true
+        working-directory: .
+
+      - name: Update submodules
+        run: git submodule update --init --recursive
+        working-directory: .
+
       - name: Cache Bazel
         uses: actions/cache@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
         with: