App: [HOLD for payment 2024-02-26] [$250] Remove MoneyRequestMerchantPage.js and copy any changes since Nov 27 into IOURequestStepMerchant.js

This is a part of https://github.com/Expensify/App/issues/29107. You can look at that issue for more context behind the cleanup process.

Problem

The app has two redundant components:

Old Component: MoneyRequestMerchantPage New Component IOURequestStepMerchant

Following the examples (example 1, example 2), the Old Component needs to be completely removed from the codebase

Look at the history of the Old Component
If there are any changes since Nov 27, 2023 which have not been added to the New Component, copy those changes
Replace all uses of the Old Component with the New Component
Remove all traces of Old Component
Be sure to update all routes and navigation to use the new :action param (instead of being hard-coded with "create")
Update any logic like isEditing to use the new action param from the route

Upwork Automation - Do Not Edit

Oh hmmm, maybe we need to wait for the prod deploy so the payment automation kicks in, I’ll reopen

Sounds good! All set to issue payment on the 26th then.

@neonbhai @DylanDylann @brunovjk Thanks for your proposal, everyone. @DylanDylann’s proposal looks good to me. He is first and mentions all the requirements here

Look at the history of the Old Component ✅
If there are any changes since Nov 27, 2023 which have not been added to the New Component, copy those changes ✅
Replace all uses of the Old Component with the New Component ✅
Remove all traces of Old Component ✅
Be sure to update all routes and navigation to use the new :action param (instead of being hard-coded with “create”) ✅
Update any logic like isEditing to use the new action param from the route ✅

🎀👀🎀 C+ reviewed

@hoangzinh Updated proposal to cover edit split flow as discuss here

Done!