[Cashtab] Improvements to token blacklist

Summary: Related to task T2761. bannedTokenIds array has been renamed to coingeckoTop500Ids, bannedTokenTickers array has been renamed coingeckoTp500Tickers, bannedTokenNames has been renamed to coingeckoTop500Tickers, bannedTickers and bannedNames arrays have been added and include the most recent scam attempt. isProbablyNotAScamTokenTicker and isProbablyNotAScamTokenName have both been altered accordingly.

Test Plan:
cd web/cashtab && npm start
navigate to create eToken screen
test banned names, ids and tickers in both the Token Name input and the Token Ticker input
observe that invalid names and tickers are rejected.

Reviewers: bytesofman, #bitcoin_abc

Reviewed By: bytesofman, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D12393