Reject next image urls in image optimizer (#68628)
Follow up on #67465, add more cases that should be rejected by image
optimizer when the url is tend to contain the generated next image with
`/_next/image` in url.
These should also get should get rejected:
* with encoded: `%2F_next%2Fimage%3`
* with asset prefix: `/assets/_next/image`
* with host: `https://<domain>/_next/image`
Closes NDX-101
x-ref:
[slack](https://vercel.slack.com/archives/C07AYREDX45/p1720111367743119)
