fix(core): remove hash/query when filtering existing files for broken link check

[Josh-Cena]

Motivation

Fix #6810

Have you read the Contributing Guidelines on pull requests?

Yes

Test Plan

Added a test

[netlify]

✔️ [V2]

🔨 Explore the source changes: 6aae1dc

🔍 Inspect the deploy log: https://app.netlify.com/sites/docusaurus-2/deploys/621ef2ad1f3bfc00075585a2

😎 Browse the preview: https://deploy-preview-6812--docusaurus-2.netlify.app

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🔴 Performance	46
🟢 Accessibility	100
🟢 Best practices	92
🟢 SEO	100
🟢 PWA	90

Lighthouse ran on https://deploy-preview-6812--docusaurus-2.netlify.app/

[github-actions]

Size Change: 0 B

Total Size: 789 kB

ℹ️ View Unchanged

Filename	Size
website/.docusaurus/globalData.json	49.7 kB
website/build/assets/css/styles.********.css	106 kB
website/build/assets/js/main.********.js	596 kB
website/build/index.html	37.6 kB

_{compressed-size-action}

[netlify]

✔️ [V2]

🔨 Explore the source changes: 8904ea6

🔍 Inspect the deploy log: https://app.netlify.com/sites/docusaurus-2/deploys/621ef34c1ac53500072b1ce6

😎 Browse the preview: https://deploy-preview-6812--docusaurus-2.netlify.app