New logged-out context A/A test to measure bias.

[selanthiraiyan]

Part of: #8235

Description

This PR adds a new logged-in context A/A test to measure bias. This is to test the ExPlat implementation in WooCommerce iOS.

Testing instructions

CI passing should be enough.

Screenshots

NA

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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.

[wpmobilebot]

You can test the changes from this Pull Request by:

• Clicking here or scanning the QR code below to access App Center
• Then installing the build number pr8237-db9af23 on your iPhone

If you need access to App Center, please ask a maintainer to add you.

[selanthiraiyan]

Closing as we have decided to clone the old A/A experiments and reuse the old proposal P2 posts.