Update for event tracker changes

[andysellick]

NOT TO BE MERGED unless also including the new version of the components gem that includes the changes detailed below

⚠️ This repo is Continuously Deployed: make sure you follow the guidance ⚠️

What / why

Update references to GA4 event tracker to cope with breaking changes introduced in alphagov/govuk_publishing_components#3057

• GA4 event tracker has been rewritten to use a data-ga-event attribute in place of data-ga4
• updating for tracking on various pages for print link

Pages affected:

• detailed guides (example detailed guide)
• guides (example guide)
• HMRC manuals (example manual and example manual section and example updates page)
• HTML publication (example HTML publication)
• manuals (example manual section and example manual)
• travel advice (example travel advice)

Also updates print link tracking for GA4 - minor change in the values passed.

Visual changes

None.

Trello cards:

• https://trello.com/c/uMgCIdtY/289-update-link-tracking
• https://trello.com/c/QFQG5IKA/363-change-some-values-on-printpage-events