Signalling Proposal for OSMO/BUSD (#899) incentivised pool

This is a signalling proposal to include the BUSD pool OSMO/BUSD (#879) into the set of assets that receive OSMO liquidity incentives. After this proposal has passed governance, pool #879 will be added to the regular incentives program of Osmosis.\n\n## About BUSD\nBUSD is a 1:1 USD-backed stablecoin approved by NYDFS and issued by Paxos on Ethereum. Binance provides Binance-Peg BUSD on other chains by locking an equivalent amount of assets on Ethereum. The current version of BUSD in use on Osmosis arrives from Ethereum via the Axelar bridge.\n\nWebsite: https://paxos.com/busd/\n\n Commonwealth Thread: https://commonwealth.im/osmosis/discussion/9766-incentivising-osmobusd