Remove hardcoded gas limits for transactions on Mainnet

[DannyDelott]

All transaction for hyperdrive flows are hardcoded at 500_000 gas limit. We need to use the gas estimator with a modifier. Goerli has trouble estimating gas to we might only need it for testing. We need to validate these estimates on mainnet before coming up with the ideal solution.

[DannyDelott]

For local and goerli this isn't a deal breaker to have a hard-coded gas limit. On Mainnet this will likely not be an issue at all.

[DannyDelott]

First thing is to remove the hardcoded limits and observe if devnet still works fine without them. If not, we can implement a solution where it's hardcoded for devnet and the default estimation for mainnet.