fix: content layer glob deletion

[florian-lefebvre]

Changes

• Closes Still getting deleted collection entries from getCollection function #12195
• Closes PLT-2539
• The map was not initialized on load so deleting a non updated entry would not actually delete it from the data store

Testing

Adds a test case

Docs

N/A bugfix

[changeset-bot]

🦋 Changeset detected

Latest commit: 16741b2

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[codspeed-hq]

CodSpeed Performance Report

Merging #12476 will degrade performances by 11.96%

_{Comparing fix/content-layer-glob-delete (16741b2) with main (733d6c1)}

Summary

❌ 1 regressions
✅ 5 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	fix/content-layer-glob-delete	Change
❌	Rendering: streaming [true], .mdx file	1 s	1.2 s	-11.96%

[ascorbic]

Well spotted