WT-1753 Factor in balance requirement for swap route and when getting amount to bridge for bridge to swap route

[imx-mikhala]

Summary

This PR ensures we are properly factoring in the balance requirements (the amounts needed of imx and erc20s to perform the action) when trying to swap and when trying to do a bridge->swap

The swap has been updated to check the balance requirements before doing a swap to ensure the user has enough balance to cover both the amount to be swapped and the balance requirement.

The bridge->swap has been updated when constructing the amount to bridge. This now ensures if we have a balance requirement for the token we are also trying to bridge->swap that the amount bridged over covers enough to handle both swapping the amount and the balance requirement.

• The logic in the bridge->swap was previously just bridging across also the balance requirement amount, but this would likely ask the user to bridge way too much across unnecessarily and the new logic figures out actual required amounts

[dreamoftrees]

Awesome work @imx-mikhala 👍 🌮