Add sponsors page

[carols10cents]

This adds a section to the bottom of the homepage for thanks in general, with links to thanks.rust-lang.org and a new sponsors page:

The new sponsors page thanks Microsoft, AWS, and Mozilla for their infrastructure sponsorships (in 2 screenshots, there isn't actually a blank spot on the page between Microsoft and AWS):

I took most of the text from the 1.37.0 release announcement.

Before merging this, I would like review on the text and logo inclusion from:

• @nikomatsakis for Mozilla
• @alexcrichton to contact AWS and get their approval
• @rylev for Microsoft

I'm happy to make any modifications; let me know what needs to change. Thanks!

[skade]

I think the approach of putting a thanks on the homepage is a very clever one, thanks!

I'll review later to get it out of the door.

[pietroalbini]

cc @davidbarsky for the AWS side.

By the way, maybe the page order should be randomized like we do for the production users page?

[davidbarsky]

This looks great! I think the randomization would be a good addition.

[skade]

I have a concern here: are we free to translate those texts or do any of the sponsors feel like they must approve translations? Or am I overthinking this?

[pietroalbini]

Mozilla is also providing a dedicated server for perf btw.

[davidbarsky]

At least from AWS' side, I think y'all should be free to translate those texts without AWS' approval. It's a decently small blurb, and so long the intent is carried over, then I don't think there will be any issue.

[rylev]

I'm triple checking with marketing about this, but it looks great to me. I don't believe there are any issues that would require approval of translations.

[skade]

Thanks @davidbarsky and @rylev!

[rylev]

This should be fine from our end! Thanks for the shout out!

[skade]

Merging this to staging, please wait for sign-off from @nikomatsakis

[nikomatsakis]

Just to be clear, I did sign off (cc @skade)