Move Terms link to footer in line with design system

[robredpath]

This is part of the work to migrate all IATI's various terms & conditions to https://web-terms.iatistandard.org/

So far I have:

• set up redirects for https://iatistandard.org/en/privacy-policy/ and https://iatistandard.org/fr/privacy-policy/ (the URLs that the links under Useful Links used to go to, also found across the web estate in footers etc)
• Changed the URLs of the EN and PR privacy pages in Wagtail and replaced their contents with a short message directing people to the new URL

Once this PR is merged and deployed I will remove those pages entirely.

TIL that Wagtail only redirects if the redirect from: URL isn't an extant page, which makes sense, but was confusing.

Two details:

• I haven't tested this; the instructions in the README didn't work for me to get this running locally
• I won't be able to deploy this, so need someone to do that for me

[jarofgreen]

This doesn't work, some CSS rule is wrong - the colour is almost but not quite the same as the background

[jarofgreen]

Ah, it's not following the HTML from the design system https://iati.github.io/design-system/?path=/docs/components-footer--docs Also that suggests the terms link should be before copyright :-P

[robredpath]

@jarofgreen ha! The iatistandard.org website doesn't fully use the design system but it would be good to align wherever possible.

[jarofgreen]

on hold, @robredpath will look at this