share the node_modules cache between dev and test

.gitlab-ci.yml

@@ -19,7 +19,7 @@ stages:
     - git submodule update --init
     - pnpm install --frozen-lockfile
   cache:
-    key: build
+    key: node_modules
     policy: pull-push
     when: on_success
     paths:
@@ -38,8 +38,6 @@ build:
 .test_common: &test_common
   <<: *build_common
   stage: test
-  cache:
-    key: test
 
 lint:
   <<: *test_common