Allow external image urls with _next/image pathname to be rendered via Image component (#69586)
### What?
Fixes #69456 which describes an issue with `next/image` component, where
an external image containing `_next/image` in the URL fails with the
error `"url" parameter cannot be recursive`.
### Why?
The `next/image` component should be able to render images from
configured hostnames without doing the recursive check.
### How?
Before checking for the existence of `_next/image` substring in the
image's path, we can simply check if the image is an external URL that
comes from a preconfigured host in the `next.config.js` file.
Example:
<img width="1207" alt="image"
src="https://github.com/user-attachments/assets/8d5c99cf-f050-40a9-b5a4-ba961b83f037">
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Co-authored-by: Steven <steven@ceriously.com>