Switch screenshots ASC orientation for iPad so all screenshots are landscape

[iamgabrielma]

Updates WooCommerceScreenshots and screenshots.json to make all iPad screenshots for ASC in landscape mode.

Description

This PR updates the UI tests for ASC screenshots so these are always performed in landscape when the device is an iPad. This is done to avoid miss-matches in ASC between portrait and landscape devices, which causes screenshots to not look the best.

Test Steps

No need for much testing, this was done extensively on thread_ts=1769135008.118939&cid=CC7L49W13-slack-CC7L49W13/p1770097840479439 . We only change the orientation, so running UI tests locally in Xcode and observing the screenshots are captured in landscape would be sufficient.

If you want to test further, for the whole flow it can be done by:

bundle exec fastlane screenshots (creates the raw screenshots)
bundle exec fastlane download_localized_strings_and_metadata_from_glotpress (downloads latest localizations)
bundle exec fastlane create_promo_screenshots (mounts screenshots)

Depending on your machine setup, you may also need the following dependencies, which will be prompted if needed by erroring in terminal:

brew install imagemagick
brew install automattic/build-tools/drawText
bundle install --with screenshots
bundle exec fastlane create_promo_screenshots

I also had to update .xcode-version and Fastfile's SIMULATOR_VERSION to match my environment (Xcode 26.2.0) of would error out when running bundle exec fastlane screenshots

[wpmobilebot]

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

	App Name	WooCommerce iOS Prototype
	Build Number	pr16578-8e9ca51
	Version	24.0
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	8e9ca51
	Installation URL	2dsq864okge58

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[joshheald]

Removed 24 and switched to draft. @iamgabrielma up to you whether we close this