perf: use replaceAll for slash normalisation

[43081j]

Splitting and joining is slow and results in garbage collection each time. We can instead use a string replaceAll for a small perf gain.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 59f5225

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 11 packages

Name	Type
@react-router/remix-routes-option-adapter	Patch
@react-router/fs-routes	Patch
create-react-router	Patch
react-router	Patch
react-router-dom	Patch
@react-router/architect	Patch
@react-router/cloudflare	Patch
@react-router/dev	Patch
@react-router/express	Patch
@react-router/node	Patch
@react-router/serve	Patch

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[remix-cla-bot]

Thank you for signing the Contributor License Agreement. Let's get this merged! 🥳

[timdorr]

@Hardanish-Singh Would you mind refraining from adding approvals to PRs? It's adding noise to the PR history. Thanks!

I think we've got enough committer approvals, so let's merge this in. Thanks!