Update Gutenberg contact from test to use contact form block

[JavonDavis]

Currently, the Gutenberg contact form test from #1639 uses a shortcode to insert the contact form block. Once the native contact form block is live we should use that or at the very least add to the existing test.

[simison]

We now have the official Contact form block! 🎉

It's behind a feature flag on wpcom just like Gutenberg itself (gutenberg/block/jetpack-preset), but you can see it here:

https://wpcalypso.wordpress.com/gutenberg/post/

Here are Markdown block specs for inspiration:
https://github.com/Automattic/wp-e2e-tests/blob/fbf6b5d8fb37bbe3f3349b077383870a8d905300/specs-blocks/gutenberg-markdown-block-spec.js

[JavonDavis]

Nice! Thanks @simison!

@gwwar any idea when this will be available from Gutenberg in WPCOM?

I did test this out on a site with Gutenberg and Jetpack enabled and the form wasn't showing in the preview and publish.. I've attached screenshots and a recording link below. Ignoring the last part of the recording where it navigates back to the wp-admin vs wpcalypso environment was there more information I needed to enter to see it in the Preview and Publish?

Recording link: https://www.dropbox.com/s/6rtk1ipfmy5mr0x/contact-form.mov?dl=0

[gwwar]

@lezama or @johnHackworth would be able to better answer that for block timelines.

[gwwar]

Maybe soonish from pMz3w-9fO-p2

[lezama]

We are aiming for early next week 👍

[JavonDavis]

Closed in #1695