Replace usage of Lodash `cloneDeep` with native `structuredClone`.

## Feature Description

As discussed in [this article](https://www.builder.io/blog/structured-clone), the native [`structuredClone`](https://developer.mozilla.org/en-US/docs/Web/API/structuredClone) function can be used instead of `cloneDeep`. It has good browser support and would allow us to marginally reduce the bundle size.

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_Do not alter or remove anything below. The following sections will be managed by moderators only._

## Acceptance criteria

* Use of `cloneDeep` within the codebase should be replaced with `structuredClone`.

## Implementation Brief

* Wait until we upgrade our version of Node to at least `17` (probably `18`), see #6026.
* Replace every import of `cloneDeep` with `structuredClone`, eg `cloneDeep( object )` to `structuredClone( object )`.
* At the time of writing, we have usage in the following files:
* `assets/js/modules/analytics-4/datastore/properties.test.js`
* `assets/js/modules/analytics-4/components/module/ModulePopularPagesWidgetGA4/index.js`
* `assets/js/modules/analytics-4/components/dashboard/DashboardAllTrafficWidgetGA4/UserCountGraph.js`
* `assets/js/modules/analytics-4/components/dashboard/DashboardAllTrafficWidgetGA4/UserDimensionsPieChart.js`
* `assets/js/modules/analytics-4/utils/data-mock.js`
* `assets/js/modules/reader-revenue-manager/components/settings/SettingsEdit.stories.js`
* `assets/js/modules/reader-revenue-manager/datastore/publications.test.js`
* `assets/js/components/GoogleChart/utils.js`
* `assets/js/components/wp-dashboard/WPDashboardPopularPagesGA4.js`
* `storybook/utils/resetGlobals.js`

### Test Coverage

* Tests should continue to pass without change; no new tests are needed.

## QA Brief

*

## Changelog entry

*

First check the Node upgrade status in #6026, then search the listed JavaScript files for Lodash cloneDeep imports and usages. Replace each listed usage with structuredClone and run the existing test suite; done means no cloneDeep usage remains and tests continue to pass without new tests.

Written by the indexing model from the issue text.