fix: disconnect @nuxt/test-utils from nuxt repo

utils.ts

@@ -277,11 +277,11 @@ export async function runInRepo(options: RunOptions & RepoOptions) {
 		overrides['nitropack'] ??= 'npm:nitropack-edge'
 		overrides['h3'] ??= 'npm:h3-nightly'
 		overrides.nuxi ??= `npm:nuxi-ng`
+		overrides['@nuxt/test-utils'] ??= `npm:@nuxt/test-utils-nightly`
 
 		overrides.nuxt ??= `${options.nuxtPath}/packages/nuxt`
 		overrides['@nuxt/kit'] ??= `${options.nuxtPath}/packages/kit`
 		overrides['@nuxt/schema'] ??= `${options.nuxtPath}/packages/schema`
-		overrides['@nuxt/test-utils'] ??= `${options.nuxtPath}/packages/test-utils`
 		overrides['@nuxt/vite-builder'] ??= `${options.nuxtPath}/packages/vite`
 		overrides[
 			'@nuxt/webpack-builder'