Wallet service provider availability

[UjCbFwtBayFM]

Description

Brave does not check for actual wallet provider availability before asking to link Rewards wallet.

Steps to Reproduce

1. Be in an unsupported territory
2. Have unlinked wallet
3. Try to link wallet

Expected result:

Brave should not display wallet providers not available in your area

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave | 1.29.76 Chromium: 93.0.4577.58 (Official Build) (64-bit)
Revision | c4410ece044414ea42fa4ba328d08195e818a99c-refs/branch-heads/4577@{#1076}
OS | Windows 10 OS Version 2004 (Build 19041.1165)

Version/Channel Information:

• Can you reproduce this issue with the current release? yes
• Can you reproduce this issue with the beta channel? yes
• Can you reproduce this issue with the nightly channel? yes