Post Code Complete test plan for EC-Changes

[toliaqat]

After the code-complete, we need to verify A3P and Testnets, before we can be confident to deploy this on the mainnet. Let's list down verifications that we need to do and in what environments.

A3P:
[list down verification steps and any e2e tests we will run for EC-Change verification]

Mainfork/Ollinet:
[list down verification steps and any e2e tests we will run for EC-Change verification]

Emerynet:
[list down verification steps and any e2e tests we will run for EC-Change verification]

Devnet (if needed):
[list down verification steps and any e2e tests we will run for EC-Change verification]