DeployICS20Transfer script doesn't work when the deployer isn't portCustomizer

[Zygimantass]

Summary of Bug

DeployICS20Transfer script doesn't work when the deployer isn't portCustomizer, since the script tries to add an IBC app.

Expected Behaviour

N/A, should discuss

Version

Steps to Reproduce

Initialize an ICS26Router contract with a portCustomizer address that isn't the deployer, and then try to deploy ICS20Transfer

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