DVN script added to LZ deployment

[CarsonCase]

It checks if a default config exists, if not, it then deploys based off a DVN provided in the config as well as a confirmation number provided there.

This config does not allow for multiple DVNs or optional ones. But our current plan seems to be to just use LZ alone if this happens and we can always update this again via multisig

[CarsonCase]

ToDo:

• Configure optional DVNs and Threshold
• Add prompt for use of default
• update the deployment script to set delegate properly
• sort the dvns
• revert if libraries not set
• set receive and send libraries

[CarsonCase]

^ Example usage of the script

[CarsonCase]

In Makefile have a big comment explaining deploy flow