[cicd] try to fix bazel cache

Author: wangxiyu191

.github/workflows/test-opensrc.yml

@@ -18,16 +18,16 @@ jobs:
       - uses: bazel-contrib/setup-bazel@0.18.0
         with:
           bazelisk-cache: true
-          disk-cache: ${{ runner.os }}-${{ github.workflow }}-unit_test
+          disk-cache: false
           repository-cache: true
-          cache-save: ${{ github.event_name != 'pull_request' }}
+          cache-save: false
       - name: bazel_test
         run:  |
           set -x
           set -e
           du -h -d 3 /${HOME}/.cache/
           df -h
-          bazelisk test //kv_cache_manager/... --cache_test_results=no --test_output=errors
+          bazelisk test //kv_cache_manager/... --cache_test_results=no --test_output=errors --jobs=4
           ls -alh ./
           du -h -d 3 /${HOME}/.cache/
           du -h -d 3 /