Prop 555: Allow Skip API Contract upload

This is a proposal to give the address osmo1raa4kyx5ypz75qqk3566c6slx2mw3qzsu6rymw permission to upload CosmWasm contracts to Osmosis without seeking governance approval for subsequent uploads. Deploying this contract will allow Skip to leverage Osmosis swap hooks to build a service that simplifies cross-chain transfers, swaps, and fee management. Skip will provide this functionality via our free API, which enables applications anywhere in Cosmos to seamlessly draw on Osmosis liquidity. While this proposal gives authority for osmo1raa4kyx5ypz75qqk3566c6slx2mw3qzsu6rymw to permissionlessly upload CosmWasm contracts to Osmosis, governance only signals approval for contracts relating to the function of Skip API service. Details can be seen in the Commonwealth thread: https://gov.osmosis.zone/discussion/11973-skip-api-contract-upload