fix: tailwind starter submenu story

[reidbarber]

Closes #7242

Our tailwind starter 'Menu' component already renders a Popover:

react-spectrum/starters/tailwind/src/Menu.tsx

Lines 19 to 25 in 37fbf02

	export function Menu<T extends object>(props: MenuProps<T>) {
	return (
	<Popover placement={props.placement} className="min-w-[150px]">
	<AriaMenu {...props} className="p-1 outline outline-0 max-h-[inherit] overflow-auto [clip-path:inset(0_0_0_0_round_.75rem)]" />
	</Popover>
	);
	}

so we don't need to render a RAC popover in the submenu story. This was causing useSafelyMouseToSubmenu to not work properly.

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

Test moving mouse to submenu in tailwind starter storybook,

🧢 Your Project:

[rspbot]

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