feat(turbopack)): use chunk items ident's hash for grouped chunk ident

[xusd320]

What

The common_path has some problem, e.g:

| lazy/
|    index.ts

The content of lazy/index.ts:

import lodash from "lodash"
window._ = lodash;

the lazy/index.ts. and lodash are bundled into a same chunk. Because the lodash's path is in node_modules directory, out of lazy directory,so the common_path will be empty. So, we change the chunk path to be determined by chunk item ident path hash.

Can be upstreamed?

Yes

[xusd320]

Upstream PR: vercel#79918