add manual switching to Mobile-Expensify

Author: rinej

.github/workflows/reassurePerformanceTests.yml

@@ -48,7 +48,10 @@ jobs:
           BASELINE_BRANCH=${BASELINE_BRANCH:="main"}
           git fetch origin "$BASELINE_BRANCH" --no-tags --depth=1
           git switch "$BASELINE_BRANCH"
-          git submodule update --init --recursive
+          cd Mobile-Expensify
+          git checkout "$(git rev-parse HEAD)"
+          cd ..
+          git add Mobile-Expensify
           npm install --force || (rm -rf node_modules && npm install --force) 
           NODE_OPTIONS=--experimental-vm-modules npx reassure --baseline
           git switch --force --detach -