Route chunks: Improve chunk generation performance

[markdalgleish]

Since caching was based on IDs which also included route chunk query strings (e.g. ?route-chunk=clientLoader) there was a lot of wasted work that couldn't be cached across route chunks. This refactor ensures that only the desired route chunk is generated based on the query string value.

[changeset-bot]

⚠️ No Changeset found

Latest commit: b6d19f9

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR