Add GA4 Tracking events

[TuukkaIkius]

Changes

• Added TrackingEvent helper function for Datalayer events
• Added Page View event
• Added 30s Page View Event
• Added InternalLinkClick tracking events to components/Link

Next PR: https://github.com/gravitational/next/pull/2479
Blog PR: https://github.com/gravitational/blog/pull/532

Merge checklist

• Disable Events on GTM
  • GA4 - Main - Custom Scroll
  • GA4 Pageview
  • GA4Event - 30s Page View
  • GA4Event - Form Submission - Cloud Trial Signup
  • GA4Event - Form Submission - Contact Sales
  • GA4Event - Form Submission - Contact Us Form
  • GA4Event - Form Submissions - Resource Download
  • GA4Event - Form Submissions - Subscribe
  • GA4Event - Internal Link Click
  • GA4Event - Pricing => Contact Sales Conversion
  • GA4Event - Pricing => Trial Signup
  • GA4Event - Self Service Sign Up from /pricing/ page
  • GA4Event - Teleport Downloads
• Merge the PRs

Testing Checklist

•  Pageview events fire on page load
•  30s Pageview fires after spending 30s on the same page
• Internal Link Clicks should send tracking data

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Name	Status	Preview	Comments	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 20, 2024 7:57am

[avatus]

Something might be tangled in the recent PRs. they all have this same engaged code instead of only the pixel code. Could you take a look?

[TuukkaIkius]

Something might be tangled in the recent PRs. they all have this same engaged code instead of only the pixel code. Could you take a look?

Yes this is on purpose. For convenience I based these tracking PRs off the Initial GTM Migrations branch as they all use the same logic for tracking their respective engaged view events. In hindsight probably a bad move but that PR will be merged before these other tracking event PRs so I don't imagine there will be issues.

[avatus]

Ah ok, no worries. In the future, if you open the PR against the branch that another PR is open for, when that base branch merges, all the other PRs automatically get rebased to master. Makes it easier on you!