deploy IDL and program through Squads multisig

[pileks]

This PR should (need to test for this repo in particular) introduce deploying programs through a Squads multisig.

It assumes that the previous workflows work, which should be the case as I've taken a look at the previous runs.

Prerequisites:

• Squads multisig PDA set up, together with vault.
  • The multisig PDA and the vault index (0 for the first vault) are inputs into the workflow dispatch, need to set them as such.
• The deployer keypair needs to be part of the squads multisig
  • They are the ones proposing the multisig transaction which sets the program/idl buffers
• Ideally, you can set the deployer keypair as the spill_address as well
• Set the workflow defaults to values that work for MetaDAO

We can later think of optimizing this flow, but the basics are now here and they should work nicely.
I have a bit of a different example (2-job workflow) set up in my example repo, we can take inspiration from there as well.