chore: don't use submodule cache (#9924)

it has caused issues on blobs PR and it was a premature optimization
anyway

.github/ci-setup-action/action.yml

@@ -19,18 +19,11 @@ runs:
         echo HOME=$RUN_HOME >> $GITHUB_ENV
         mkdir -p $RUN_HOME
 
-    - name: Cache Submodules
-      id: cache-submodules
-      uses: actions/cache@v4
-      with:
-        path: .git/modules
-        key: submodules-${{ hashFiles('.gitmodules') }}-spot-ebs
-
     - name: Checkout Submodules
       shell: bash
       run: |
         git config --global --add safe.directory '*'
-        git submodule sync --recursive && git submodule update --init --recursive
+        git submodule update --init --recursive
 
     # TODO reconsider how jq gets into image
     - name: Setup jq