Coingecko check should be moved out of unit tests

[zarazan]

Summary

Problem Definition

Unit tests should not hit outside services. This will prevent the required unit tests check from blocking PRs when the coingecko API is not responding.

OR - we should mock the API response in the unit tests and move anything testing the API request to an integration test if we still need it.

Sample failure output:

=== RUN TestCheckProviderMins_Valid
3:59PM WRN Coin gecko found 0 providers for OJO
3:59PM INF providers supporting ATOM: [BingX WhiteBIT Gate.io DigiFinex LBank Binance Phemex BitMart Bitget MEXC XT.COM CITEX Deepcoin P2B Bybit CoinTR Pro Dex-Trade OKX Helix KuCoin PointPay AscendEX (BitMax) Huobi Toobit DIFX Trubit BTCEX QMall CoinEx BtcTurk PRO LATOKEN LocalTrade Coinbase Exchange Bitazza BitStorage FameEX Kraken Poloniex Binance US Bitfinex Bitci TR]
3:59PM INF providers supporting USDT: [Bitfinex Kraken Crypto.com Exchange Coinbase Exchange WhiteBIT BTSE Coinzoom]
--- PASS: TestCheckProviderMins_Valid (1.60s)
=== RUN TestCheckProviderMins_Invalid
3:59PM WRN Coin gecko found 0 providers for OJO
--- PASS: TestCheckProviderMins_Invalid (0.54s)
=== RUN TestProviderWithAPIKey_Valid
3:59PM INF providers supporting ATOM: [BingX WhiteBIT Gate.io DigiFinex LBank Binance Phemex BitMart Bitget MEXC XT.COM CITEX Deepcoin P2B Bybit CoinTR Pro Dex-Trade OKX Helix KuCoin PointPay AscendEX (BitMax) Huobi Toobit DIFX Trubit BTCEX QMall CoinEx BtcTurk PRO LATOKEN LocalTrade Coinbase Exchange Bitazza BitStorage FameEX Kraken Poloniex Binance US Bitfinex Bitci TR]
3:59PM INF providers supporting USDT: [Bitfinex Kraken Crypto.com Exchange Coinbase Exchange WhiteBIT BTSE Coinzoom]
3:59PM ERR failed to start currency provider tracker error="json: cannot unmarshal object into Go value of type []config.coinList"

Proposal

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