Closes WOOMOB-1407

Description

As continuation from #16391 , this PR addresses the warnings coming from WPMediaPicker due to deprecated code from iOS17+. As before, we remove other bits that throw warnings but are unused in the WCiOS codebase (WPInputMediaPickerViewController). Why? Since these are no longer maintained as part of the WordPressAuthenticator library, are now part of the WCiOS codebase and represent a maintenance burden for us, so let's get rid of them if unused.

WPMediaPicker is used mainly when adding images to products, but also manages some of the low-level internals of the camera (types, orientation, ... ), used for example when we scan barcodes or QRs to add products to cart/orders

Changes:

• For media types, we move from using raw strings to enum-case identifiers
• Updates the trait registration pattern
• Updates from video orientation to video rotation
• Updates how we grab the view on the top of the stack

Test Steps

• On a site with a product that can be scanned via barcode scanner/QR (if you have none, just go to Products > Open product details > Inventory > SKU and scan any barcode around you, then save changes)
• Allow photo library access to the app if disabled
• Go to Products > Create or update an existing product > Add a product image > select WordPress Media Library. Should work as expected.
• Products > Create or update an existing product > Add a product image > select Take a photo. Should work as expected.
• Unlock orientation lock in device if enabled
• Go to Orders > create new by tapping the QR code at the top left corner. Change orientations and observe that the camera works as expected. Scan the barcode or QR and see how behaves normally. Note that orientation changes only work when we present the scanner, not when we push it into the stack (like in products), this is expected and existing functionality.