Migrate new crm contact form to gl-drawer

What does this MR do and why?

No sooner did We introduce a "new contact" form (!75047 (merged)) than we discovered a nicer UX used by the "new requirement" form.

This MR applies the UX from the "new requirement" form to the "new contact" form by leveraging gl-drawer.

We also introduce gl-toast to confirm a new contact has been successfully created.

Screenshots or screen recordings

How to set up and validate locally

Head to http://gdk.test:3000/groups/flightjs/-/crm/contacts/

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #2256