fix(core): fix postinstall failure due to project graph build error

Delegate error handling to calling functions and avoid `process.exit(1)`, which causes the package's postinstall stage to fail if there are problems with the project graph

Closes nrwl#9451

packages/nx/src/project-graph/project-graph.ts

@@ -54,13 +54,8 @@ export function readCachedProjectGraph(): ProjectGraph {
 }
 
 async function buildProjectGraphWithoutDaemon() {
-  try {
-    await defaultFileHasher.ensureInitialized();
-    return await buildProjectGraph();
-  } catch (e) {
-    printErrorMessage(e);
-    process.exit(1);
-  }
+  await defaultFileHasher.ensureInitialized();
+  return await buildProjectGraph();
 }
 
 /**