[REFACTOR] FRM flows

[kashif-m]

Feature Description

FRM feature has to be refactored and re-implemented as per the findings. This requires removal of existing flows and adding new flows.

Below flows are to be implemented for distinct FRM states

• PreAuth - Accept, Decline, Review, StepUpChallenge, StepUpFrictionless
• PostAuth - Accept, Decline, Review

Possible Implementation

Flows to be added / removed for given states

PreAuth

• ➕ Review
• ➕ StepUp

PostAuth

• ➕ Review
• ➕ VoidTxn
• ➖ AutoRefund

Sub issues
PostAuth FRM : #4399
PreAuth FRM :

Have you spent some time checking if this feature request has been raised before?

• I checked and didn't find a similar issue

Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to submit a PR?

Yes, I am willing to submit a PR!