test: Ensure Debug IDs match

[timfish]

I thought I'd found an issue with injection of debug IDs when they're already injected by the bundler. I improved the tests to check this and then realised that everything is working and I was looking in the wrong directory.

[github-actions]

Semver Impact of This PR

⚪ None (no version bump detected)

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Bug Fixes 🐛

Plugin Manager

• Respect sourcemap.ignore values for injecting debugIDs by s1gr1d in #836
• Enable "rejectOnError" in debug by s1gr1d in #837

Other

• (vite) Skip HTML injection for MPA but keep it for SPA by s1gr1d in #843

Documentation 📚

• Add RELEASE.md to document release process by nicohrubec in #834

Build / dependencies / internal 🔧

• (release) Switch from action-prepare-release to Craft by BYK in #831
• Use pull_request_target for changelog preview by BYK in #842

Other

• test: Ensure Debug IDs match by timfish in #840

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