Fix WP Dashboard stories

[techanvil]

Fix WP Dashboard stories.

Bug Description

Most of the WP Dashboard stories are no longer working properly and need to be fixed.

Steps to reproduce

1. Navigate to the following Storybook components:
   a. Views > WPDashboardApp > WPDashboardActivateAnalyticsCTA
   b. Views > WPDashboardApp > WPDashboardPopularPagesGA4
   c. Views > WPDashboardApp > WPDashboardSessionDurationGA4
   d. Views > WPDashboardApp > WPDashboardUniqueVisitorsChartGA4
   e. Views > WPDashboardApp > WPDashboardUniqueVisitorsGA4
   f. Views > WPDashboardApp > WPDashboardWidgets
2. For each component, see how some or all of the stories are incorrect, either showing the loading state out of context, or simply rendering an empty/broken layout.

Screenshots

For example, here's the WPDashboardWidgets component, incorrectly displaying the loading state for its Ready story:

Additional Context

• PHP Version: any
• OS: any
• Browser: any
• Plugin Version: raised at 1.150.0
• Device: any

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Acceptance criteria

• The stories listed in steps to reproduce should all display as intended.
• A VRT scenario should be added for the WPDashboardApp/WPDashboardWidgets/Ready story to help prevent the stories getting broken again in future.

Implementation Brief

Test Coverage

QA Brief

Changelog entry