fix: disable fiat ramp address copy for utxos

[NeOMakinG]

Description

The Fiat Ramp feature was including a field to copy the destination address, but we can't do this for UTXOs, cf #7663 (comment)

I disabled it for any UTXO accounts

Issue (if applicable)

N/A

Risk

Low

High Risk PRs Require 2 approvals

What protocols, transaction types, wallets or contract interactions might be affected by this PR?

Testing

• Go to fiat ramp
• Select an UTXO asset such as BTC or DOGE, the copy button should not be visible
• Select any other assets of different chain types, the copy button should be visible

Engineering

n/a

Operations

n/a

• 🏁 My feature is behind a flag and doesn't require operations testing (yet)

Screenshots (if applicable)

Polygon

Ethereum

BTC

DOGE

[gomesalexandre]

see inline comment

[gomesalexandre]

Retested locally, confirmed this does what it says on the box!

https://jam.dev/c/ba6d445b-d5bb-4b59-935a-d831f74a22e0