[Product Creation AI] Remove feature flag and unused code

[selanthiraiyan]

Closes: #13118
Closes: #13103
Closes: #13266

Description

Removes product creation AI feature flags. Removes unused code related to product creation AI feature.

🗒️ The 300+ line code changes are due to deleted files. I hope it is fine to keep this in a single PR. Let me know if you prefer this to be split into smaller PRs.

Changes

• Deleted old package flow related code.
• Remove unused code files tracked by this issue. Remove the package flow and related code. #13266
• Removed feature flags.
• Renamed the productName step into productFeatures and update unit tests.
• Removed unused unit tests.

Steps to reproduce

Prerequisites

• Create a JN site with "Jetpack AI" plugin enabled
• Test this on an iPhone/iPad to be able to use camera

Steps

• Login into the app
• Navigate to products tap "+"
• Please follow the test plan and smoke test to ensure the feature works as before. pe5sF9-2Wo-p2
• Follow instructions from this [Product Creation AI] Release M3 #13412 and it works.

Testing information

• I smoke-tested the Product Creation AI feature to ensure it works as before.
• While testing, I found that product image upload failure is not handled. Logged an issue here.

Screenshots

ProductCreationAI.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.

[dangermattic]

	2 Warnings
⚠️	View files have been modified, but no screenshot or video is included in the pull request. Consider adding some for clarity.
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

	1 Message
📖	This PR contains changes to Tracks-related logic. Please ensure (author and reviewer) the following are completed: The tracks events must be validated in the Tracks system. Verify the internal Tracks spreadsheet has also been updated. Please consider registering any new events. The PR must be assigned the category: tracks label.

Generated by 🚫 Danger

[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	pr14010-de4a5f1
	Version	20.6
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	de4a5f1
	App Center Build	WooCommerce - Prototype Builds #11083

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

[wpmobilebot]

Version 20.6 has now entered code-freeze, so the milestone of this PR has been updated to 20.7.

[hafizrahman]

I found the faeture to still work fine in my smoke tests yesterday. I'll continue checking the code now.

[hafizrahman]

Sorry I got distracted in a different task. Code looks good and comprehensive to me

Forgot to add, I smoke tested product creation AI in:

• Simulator iPad with iOS 17.5
• iPhone 12 with iOS 17.4.1

Seeing no issue in both of them and the texts were generated properly each time and the draft can be generated and published.

I tested the photo mode using my iPhone and it was still able to find the text in the picture properly.