normalize page path before checking for cached manifest in webpack

[AbhiShake1]

What?

this should fix index route not loading due to the client reference manifest being generated in index/index/ but we were expecting it in index/

Why?

when we normalize the page path before writing manifest and other assets, we see this behavior: / -> /index /index -> /index/index

How?

by normalizing the static page path, we now check for the manifest in index/index folder instead of index/ folder which fixes the issue

Closes NEXT- Fixes #69061

[ijjk]

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[AbhiShake1]

Hi, could you please add a test case for this, potentially in https://github.com/vercel/next.js/tree/canary/test/e2e/app-dir/app

Sorry i was afk for a long time. I see another pr doing the same thing so closing this