Fix for locale suggestions links losing query string

[artpi]

Fix for BSKY-202

When we have a localized flow, we are losing query string when switching to a different locale like suggested here. We are relying on this query string to pass along the prompt information.:

Testing instructions

1. Set your browser locale to NOT english
2. Open incognito
3. Go to http://calypso.localhost:3000/setup/ai-site-builder/user/?prompt=mariachi+restaurant
4. Clcik the notice "change language to xyz"
5. Observe query string being preserved
6. Continue signup

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-139013

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-139013&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-139013&env=a8c-for-agencies

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~4 bytes added 📈 [gzipped])

Details

name               parsed_size           gzip_size
stepper-user-step        +23 B  (+0.0%)       +4 B  (+0.0%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[matticbot]

This PR modifies the release build for the following Calypso Apps:

For info about this notification, see here: PCYsg-OT6-p2

• blaze-dashboard
• command-palette-wp-admin
• help-center
• notifications
• odyssey-stats
• whats-new
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug locale_suggestions_fix on your sandbox.

[alshakero]

Great fix. Thanks!