Fix ThreatDataView popover content

[dkmyta]

Fixes #
The content in the IconToolTip popover is not properly styled.

Proposed changes:

• Add CSS to apply changes

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

• https://github.com/Automattic/jetpack-scan-team/issues/1471

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

• No

Testing instructions:

• Checkout this branch
• Load storybook with cd projects/js-packages/storybook && npm run storybook:dev
• View the Threats Data View component and hover over the red info icon
• Ensure the content is position and styled appropriately

Screenshot

[github-actions]

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[github-actions]

Are you an Automattician? The PR will need to be tested on WordPress.com. This comment will be updated with testing instructions as soon the build is complete.

[dkmyta]

Closed in favour of #39856