test(federation): updated Display for GraphPath to show multiple conditions

[duckki]

In order to match JS implementation (github) more closely.

• I noticed a discrepancy in the GraphPath printing code compared to the JS version.
• But, then I realized QueryGraphEdge::fmt is doing the right thing, already.

A follow-up of PR #7929.

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Checklist

Complete the checklist (and note appropriate exceptions) before the PR is marked ready-for-review.

• Changes are compatible[^1]
• Documentation[^2] completed
• Performance impact assessed and acceptable
• Metrics and logs are added[^3] and documented
• Tests added and passing[^4]
  • Unit Tests
  • Integration Tests
  • Manual Tests

Exceptions

This PR is only for debug messages. No behavioral changes.

[github-actions]

@duckki, please consider creating a changeset entry in /.changesets/. These instructions describe the process and tooling.

[apollo-librarian]

✅ Docs preview ready

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File Changes

0 new, 6 changed, 0 removed

* (developer-tools)/apollo-server/(latest)/getting-started.mdx
* (developer-tools)/apollo-server/(latest)/data/subscriptions.mdx
* (developer-tools)/apollo-server/(latest)/integrations/mern.mdx
* (developer-tools)/apollo-server/(latest)/schema/directives.md
* (developer-tools)/apollo-server/(latest)/testing/testing.mdx
* (developer-tools)/apollo-server/(latest)/workflow/generate-types.mdx

Build ID: 23ed1ed35ff7b809d87250f7

URL: https://www.apollographql.com/docs/deploy-preview/23ed1ed35ff7b809d87250f7