Boost: Update Premium Tooltip to use RNA IconTooltip component

[dilirity]

Fixes #35307

Proposed changes:

• Update component to usa RNA IconTooltip. This changes the look of the tooltip, but at least is's similar to the rest.

  Before:

  

  After:

  

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

n/a

Does this pull request change what data or activity we track or use?

no

Testing instructions:

• Make sure the tooltip shows up and looks okay.

[github-actions]

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Boost plugin:

• Next scheduled release: March 5, 2024.
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[pyronaur]