[Media] Migrate WPCom media upload to /wp/v2 endpoints

[selanthiraiyan]

Closes: #14232

Description

This PR updates the handling of the media operations (upload and fetch) to the user the /wp/v2 endpoints instead of the legacy /v1.1 ones, this is needed to fix upload problems for sites with XMLRPC issues.

Changes

• Remove code which was using v1.1 endpoint for uploading media.
• Call v2 endpoint method for all types of sites, including JCP and Application password login.
• Update unit tests.

⚠️ There is a known issue related to loading media from WP media library and updating Product ID to media. #14550 We can work on this in a separate PR.

Steps to reproduce

a. No Jetpack case (Application Password)

1. Have a .org site with no Jetpack,
2. Install "Disable XML-RPC-API" plugin.
3. In the app, login to site with application password,
4. Go to Products > Add Product > Add Product Image
5. Try uploading images from your device
6. Save and Publish the product and validate that image uploads work.

b. Jetpack CP site case

1. Have a .org site with no Jetpack but with a plugin with Jetpack CP (I use "Blaze Ads" and connect WPCOM account while attempting to create a Blaze campaign from the wp-admin page)
2. Install "Disable XML-RPC-API" plugin.
3. Setup the Jetpack CP plugin and connect it to your WordPress.com account
4. In the app, login to site with WordPress.com account,
5. Go to Products > Add Product > Add Product Image
6. Try uploading images from your device
7. Save and Publish the product and validate that image uploads work.

c. WordPress.com / full Jetpack site case

1. Have a .org site with Jetpack plugin
2. Install "Disable XML-RPC-API" plugin.
3. Setup the Jetpack plugin and connect it to your WordPress.com account,
4. In the app, login to site with WordPress.com account,
5. Go to Products > Add Product > Add Product Image
6. Try uploading images from your device
7. Save and Publish the product and validate that image uploads work.

Testing information

• I tested that images can uploaded for all the three site types. (JCP, Jetpack, Self-hosted application password login).

Screenshots

Simulator.Screen.Recording.-.iPhone.16.-.2024-11-27.at.21.57.32.mp4

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• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on all devices (phone/tablet) and no regressions are added.

[wpmobilebot]

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

	App Name	WooCommerce iOS
	Build Number	pr14537-3e96abc
	Version	21.2
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	3e96abc
	App Center Build	WooCommerce - Prototype Builds #11853

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

[itsmeichigo]

Tested with simulator iPhone 16 Pro iOS 18.0 and confirmed that uploading images works for sites (non-JP, JCP, or JP sites) without XMLRPC ✅

[itsmeichigo]

Super nit: indentation needs to be updated here.

[selanthiraiyan]

Good catch. Done in de07dbd