CLN updates

[orbitalturtle]

This PR updates CLN to a branch where we can make payments successfully. To do so we pull in CLN's Dockerfile and related files that we need to build the binary.

We can probably remove most of these files once CLN releases v24.08. But in the meantime, this will help with testing.

A couple notes when making payments however:

• It works best when LNDK is updated to include transient keys for signing invoice requests lndk-org/lndk#133
  But even with this change included, there is an annoying error case, where if we hit a single error, all subsequent payments to the same offer fail. I'm not sure why but plan to look into it further.
• Similar to when paying Eclair offers, payments of 1000 msats fail because they are too small, but payments of 10000 msats succeed