Import: skip WordPress Migration selector for WP imports starting from I don't have a website

[ouikhuan]

Proposed Changes

• When a user starts the import flow from "I don't have a site address" and click WordPress later to import their content, the migration selector screen is shown for two options "Import everything" and "import content only", which "import everything" option doesn't make sense in this particular flow.
• Redirect user to import content only block if a user doesn't have a site address.
• Remove the "Import Everything" part from "View the import guide" modal if a user doesn't have a site address.

Testing Instructions

1. Navigate to /setup/import?siteSlug={SLUG}.
2. Click "I don't have a site address" on the right top corner.
3. Click WordPress option.
4. Click "View the import guide" to see if there's only "Import Content Only" description.
5. Click "Import your content" -> you should be pointed to "Import content from WordPress page" directly.
6. Click "< Back" on the left top corner.
7. Type in a site address and hit enter.
8. Click "What can be imported" to see if there are both "Import Content Only" and "Import Everything".
9. Click "Import your content" -> you will be brought to the original migration selector page.

Before:

mirgation-selector-before.mov

After:

mirgration-selector-after.mov

Screenshot for the wording changed:

Related to #64364

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-36844

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-36844&env=jetpack

[matticbot]

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

App Entrypoints (~152 bytes added 📈 [gzipped])

name           parsed_size           gzip_size
entry-stepper       +263 B  (+0.0%)     +152 B  (+0.0%)

Common code that is always downloaded and parsed every time the app is loaded, no matter which route is used.

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.

[bogiii]

Looks good to me! 🚢

[a8ci18n]

This Pull Request is now available for translation here: https://translate.wordpress.com/deliverables/7416486

Thank you @ouikhuan for including a screenshot in the description! This is really helpful for our translators.

[a8ci18n]

Translation for this Pull Request has now been finished.