Submission Review Guidelines:

• I have followed the WooCommerce Contributing Guidelines and the WordPress Coding Standards.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
• I have reviewed my code for security best practices.
• Following the above guidelines will result in quick merges and clear and detailed feedback when appropriate.

Changes proposed in this Pull Request:

This PR updates the positioning of the DateTimePickerControl's dropdown to use popoverProps.placement instead of the deprecated position prop. This accomplishes to

It also sets the popoverProps.anchor to tweak the positioning of the dropdown (it will stay closer to the input control in all orientations).

Closes #38447.

Before

Note that the dropdown is not left-aligned with the input control.

After

Note that the dropdown is left-aligned with the input control.

How to test the changes in this Pull Request:

Using the WooCommerce Testing Instructions Guide, include your detailed testing instructions:

1. Enable the block-based product editor
2. Go to Products > Add New
3. Go to the Pricing tab
4. Enter a List price and Sale price
5. Enable Schedule sale
6. Verify the positioning of the dropdown in the date fields is correct.
7. Verify the following warning does not appear in the browser console.

`position` prop in wp.components.Dropdown is deprecated since version 6.2. Please use `popoverProps.placement` prop instead. Note: Note that the `position` prop will override any values passed through the `popoverProps.placement` prop.