Add HMRC's UR banner to required pages

[hannako]

As requested by HMRC via our normal processes
https://trello.com/c/1Pln7K5R/2809-govuk-user-research-banner-requests-hmrc-m

Review apps

• https://government-frontend-pr-3314.herokuapp.com/government/collections/tax-compliance-detailed-information
• https://government-frontend-pr-3314.herokuapp.com/government/collections/hm-revenue-and-customs-compliance-checks-factsheets
• https://government-frontend-pr-3314.herokuapp.com/difficulties-paying-hmrc
• https://government-frontend-pr-3314.herokuapp.com/tax-help
• https://government-frontend-pr-3314.herokuapp.com/get-help-hmrc-extra-support
• https://government-frontend-pr-3314.herokuapp.com/guidance/voluntary-and-community-sector-organisations-who-can-give-you-extra-support
• https://government-frontend-pr-3314.herokuapp.com/tax-appeals
• https://government-frontend-pr-3314.herokuapp.com/guidance/how-to-get-a-review-of-an-hmrc-decision
• https://government-frontend-pr-3314.herokuapp.com/guidance/tax-disputes-alternative-dispute-resolution-adr

[MartinJJones]

The changes look good to me 👍

Non-blocking, the existing spacing issue with the intervention_banner on mobile and tablet can be fixed by removing the govuk-width-container CSS class from the intervention_banner.html.erb template - https://github.com/alphagov/government-frontend/blob/main/app/views/shared/_intervention_banner.html.erb#L2. This is not required for the intervention banner and will add 15px of left and right margin on mobile/tablet.

I'm happy to create a separate PR for this as well if preferred 😄.

[hannako]

@MartinJJones I've rebased now to include #3315