I2I: Deployment and serving of AMP via Cloudflare

### Summary

This I2I discusses the concrete steps and timeline for performing the disentangling of the AMP runtime CDN and the Google AMP Cache.

#### Implementation guidelines — * * * _this is the thing that needs reviewing in this I2I_ * * *
https://docs.google.com/document/d/1QD0SBwgmZxrvJTpv68ytTI2oKxq4EOi-mkSCKm2JTPc/edit

### Design Document

Design document with analysis of alternatives considered, privacy, and security consideration: https://docs.google.com/document/d/1IMfhVgxCRW0Cq1N7xvflfcoxGdnVshvA92je_wDxAY0/edit

### Motivation

- https://github.com/ampproject/wg-caching/issues/13
- Public announcement of intent: https://openjsf.org/blog/2021/08/13/an-update-on-how-amp-is-served-at-the-openjs-foundation/

### Alternative Solutions

- See **design document** above for alternatives considered with respect to the goal
- See **implementation guidelines** above for alternatives considered with respect to the implementation details

### Launch Tracker

https://docs.google.com/spreadsheets/d/1QL42wafo1jODim8EN5HujEbxw12EeG-trGECnbzDjQA/edit

### Notifications

/cc @ampproject/wg-infra @ampproject/wg-performance @ampproject/wg-security-privacy @ampproject/wg-caching @ampproject/wg-foundation-onboarding @ampproject/tsc