Resolve "Move the 'Number of employees' field to its own row"

What does this MR do and why?

Move the Number of employees field to a separate line on this page below 'Company Name'.

Related to #458435 (closed)

MR acceptance checklist

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Before	After

How to set up and validate locally

1. Setup to simulate SaaS and restart GDK
2. Visit /-/trial_registrations/new on your gdk site.
3. Register, and fill in the welcome form with My company or team and submit.
4. At this point you should see the form