fix: Experiment List Tooltip is Transparent [WEB-1827]

[julian-determined-ai]

Description

The Tooltip used in our useTableTooltip method is currently imported from Antd and not Hew. This update implements the Hew tooltip.

Test Plan

1. Navigate to the experiment comparison table on the uncategorized page or any workspace project.
2. Ensure the State and User columns are enabled. You can enable them by clicking the "Columns" button on top of the table.
3. With the theme in light mode, hover over the user icon and then the state icon, ensure that both tooltips that show have a solid background.
4. With the theme in dark mode, hover over the user icon and then the state icon, ensure that both tooltips that show have a solid background.

Commentary (optional)

Checklist

• Changes have been manually QA'd
• User-facing API changes need the "User-facing API Change" label.
• Release notes should be added as a separate file under docs/release-notes/.
  See Release Note for details.
• Licenses should be included for new code which was copied and/or modified from any external code.

Ticket

WEB-1827

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[mapmeld]

✅ fixes the issue, LGTM