Support space-between in form field

[Misiu]

Is your feature request related to a problem? Please describe.
I'm trying to create this type of UI:

with web components, but unfortunately, it isn't easily doable.
I was suggested to use formfield but this gives me this:

or:

when I add alignEnd to mwc-formfield

Describe the solution you'd like
I'd like to have the ability to easily add space between label and slot inside mwc-formfield.

Proposed syntax:

Results I'm expecting to get:

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
I was suggested by @asyncLiz (in #999) to create this FR. Maybe she will be able to add additional context to this.
I've tried doing that with styles, but I wasn't able to get results I want:
https://stackblitz.com/edit/material-web-components-fiqjsb?file=index.js

[asyncLiz]

Upstream dependent on material-components/material-components-web#5747

[asyncLiz]

Fixed in #1083

[Misiu]

@asyncLiz thank you 🙂
Now let's wait for the release.