[HIP 11] Fast bridging support and co-incentives for sUSD and SNX

Summary This proposal is to add a co-incentive for sUSD bridging from/to Optimism and Ethereum Mainnet.

The Synthetix Treasury Council has signaled to incentivize sUSD/hsUSD LPs with $5k worth of $OP monthly.

This proposal extends HIP-5 to add co-incentives to sUSD pool, and adjust the rewards for the SNX pool to a $5k worth of $OP monthly.

Rationale As original HIP-5 does not specify for hsUSD/sUSD co-incentive yet. This proposal proposes a co-incentive for the sUSD pool with Synthetix Treasury Council which has signaled to post $5k worth of $OP.

Furthermore, to ensure that both of these rewards are the same the SNX co-incentive will be adjusted to $5k worth of $OP monthly.

Specification Incentivize liquidity for hsUSD/sUSD with $5k of $OP monthly with a matching $HOP incentive.

Incentivize liquidity for hSNX/SNX with $5k of $OP monthly with a matching $HOP incentive.