Honestly, I would be more surprised if any engineer (intern or otherwise) at Intel ever noticed that the images came from an AMD presentation, let alone actively participated in copying the images from said source.
[0] https://twitter.com/IanCutress/status/1511716678199132173
Patentability is solely a matter of the claims made at the end. Those claims will of course be interpreted in the context set out by the method description, but it is entirely normal for a patent to describe the state of the art before discussing a novel method (about which actual claims are then made).
(IANAL)
The plagiarized content:
1. Is not what is being patented here.
2. Is not created by Intel engineers (or likely even Intel employees). They're busy designing chips.
This seems like a bit of a stretch, given that Intel had a lead in CPU power for years and is still quite close to AMD.