fix(core): prune project graph after affected nodes are found to avoid errors

[jaysoo]

We prune external nodes from project graph when outputting JSON so it doesn't get too bloated. However, this erroring out when finding affected nodes since affected logic requires external nodes to be present.

Current Behavior

nx graph --affected errors out

Expected Behavior

nx graph --affected works as expected

Related Issue(s)

Fixes #

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 19, 2023 6:13pm

[nx-cloud]

☁️ Nx Cloud Report

CI is running/has finished running commands for commit 77ab6f8. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this branch

---

✅ Successfully ran 8 targets

• nx affected -t e2e-macos --parallel=1 --base=ef5813a7b7744978ce12355eee9f8b8b7d01030e --head=77ab6f88247ce00f2cbe1c6986af33ced531710e
• nx affected --target=e2e --base=ef5813a7b7744978ce12355eee9f8b8b7d01030e --head=77ab6f88247ce00f2cbe1c6986af33ced531710e --parallel=1
• nx affected --target=test --base=ef5813a7b7744978ce12355eee9f8b8b7d01030e --head=77ab6f88247ce00f2cbe1c6986af33ced531710e --parallel=1
• nx affected --target=build --base=ef5813a7b7744978ce12355eee9f8b8b7d01030e --head=77ab6f88247ce00f2cbe1c6986af33ced531710e --parallel=3
• nx run-many -t check-imports check-commit check-lock-files depcheck check-codeowners documentation --parallel=1 --no-dte
• nx affected --target=lint --base=ef5813a7b7744978ce12355eee9f8b8b7d01030e --head=77ab6f88247ce00f2cbe1c6986af33ced531710e --parallel=3
• nx-cloud record -- nx format:check --base=ef5813a7b7744978ce12355eee9f8b8b7d01030e --head=77ab6f88247ce00f2cbe1c6986af33ced531710e
• nx documentation --no-dte

---

Sent with 💌 from NxCloud.

[github-actions]

This pull request has already been merged/closed. If you experience issues related to these changes, please open a new issue referencing this pull request.