ARB Bootstrapping liquidity incentives

This proposal would add OSMO incentives directly to the ARB/OSMO pool (#1011) consisting of 0.5% of liquidity incentives and maintain this for a period of 4 routine incentive proposals.\n\n## Details\nThis proposal would provide initial incentives on the 16th of May by actioning the following:\n* Directly allocating 0.5% of incentives to the ARB/OSMO pool (#1011)\n* Set Minimum incentives for the ARB/OSMO (#1011) pool of 0.5% for 4 routine proposals to retain this level of liquidity incentives while liquidity is built.\n\nBootstrapping incentives indicate that Osmosis stakers wish to quickly establish functional liquidity of ARB to facilitate trading and liquidity flow between Arbitrum and Osmosis via the Axelar bridge.\n\n## About Arbitrum\nArbitrum is an Ethereum L2, optimistic rollup. As an Ethereum scaling protocol, it makes transactions significantly faster and cheaper. The team at Offchain Labs launched the flagship chain, Arbitrum One, in May of 2021, and the Arbitrum ecosystem has quickly become a hub for DeFi. A separate AnyTrust chain, Arbitrum Nova was introduced in July of 2022 which is optimized for low-cost transactions.\n\nThe ARB token airdrop on March 23, 2023 decentralized governance of both Arbitrum chains and their underlying protocols. As part of this initial decentralization effort, 113 million ARB tokens were distributed to DAOs building apps on Arbitrum via an airdrop to their respective treasury addresses.\n\nARB is currently provided on Osmosis via the Axelar bridge.\n\nWebsite: https://arbitrum.foundation/\n\nCommonwealth Thread: https://commonwealth.im/osmosis/discussion/11358-arbitrum-incentives