Re-enable tests for rolldown-vite ecosystem-ci

[sapphi-red]

In #602, I skipped some tests for rolldown-vite. We should re-enable these after the upstream issues are resolved.

• playground/vue-lib > should output tree shakeable css module code: blocked by minifier: remove unused variable declaration oxc-project/oxc#10033
• playground/vue-sourcemap > serve:vue-sourcemap > ts: snapshot diff, we can remove this once rolldown-vite is merged to normal Vite
• playground/vue > scoped style should be tree-shakeable: blocked by [Feature Request]: remove side effect free import before chunking rolldown/rolldown#4812
• playground/vue-legacy: plugin-legacy is not supported now