Import: skip WordPress Migration selector for WP imports starting from I don’t have a website #7416486

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:

After:

Screenshot for the wording changes:

Related to #64364