Pricing page update 202106a

Description

This issue is for the latest AB test iteration of the /pricing/ page on about.gitlab.com by the Digital Experience team.

Closes #11850 (closed)

Must have

"Iteration 2"

• Move the tag lines from below the prices back to above the prices, and change the copy.
• Remove the lines "for you / team / org" line
• Change checkmarks into dots
• Update the line-height of list-items in the free tier
• Updated copy beneath the tiers
• Change the themes file to match the copy iteration doc
• Within our metrics platform, add tracking for:
  • Number of clicks on the credit card disclaimer

Should have

• Credit card messaging update

Could have

• Add contact sales
• Within our metrics platform, add tracking for:
  • Number of clicks on the new CTA