Issue Description

When querying for nested entity fields decorated with @requires, a gateway for a federated graph fails to build a query plan, resulting in error "Cannot add selection of field \"X\" to selection set of parent type \"Y\"". This is a critical issue for my org.

All @apollo/* packages at latest, and composition done with latest (v2.8.4) rules.

Link to Reproduction

CodeSandbox

Reproduction Steps

1. Start all services (if not already running) with:

npm run dev

2. Run test query to reproduce the error with:

npm run test:query