[CIAB Bookings] Update logic of tabs filtering

[hichamboushaba]

Closes WOOMOB-1404

Description

This PR updates the logic of filtering to match what the API expects, because the API stores dates without timezone information (dates stored as strings), it ignores any timezone information when filtering, so to get the correct results for date filtering, we need to send the dates as UTC.

Steps to reproduce

1. Prepare a CIAB site with bookings (check previous PRs for steps if needed).
2. Create some bookings.
3. Confirm Today and Upcoming behave as expected.

Testing information

• Check the bookings times listed on the server, and confirm that Today lists all bookings for today, and Upcoming lists all future bookings (from tomorrow midnight).

The tests that have been performed

• The above.
• Also I created a booking at 11:30pm on the server, and confirmed that the logic now works well, as this booking wasn't shown before for today (my local timezone is UTC+1).

Images/gif

Before (missing one booking)	After

• I have considered if this change warrants release notes and have added them to RELEASE-NOTES.txt if necessary. Use the "[Internal]" label for non-user-facing changes.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce-Wear Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce-Wear Android
	Platform	⌚️ Wear OS
	Flavor	Jalapeno
	Build Type	Debug
	Commit	388529f
	Direct Download	woocommerce-wear-prototype-build-pr14686-388529f.apk

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Commit	388529f
	Direct Download	woocommerce-prototype-build-pr14686-388529f.apk

[AdamGrzybkowski]

The filtering now works correctly!