Merge pull request #2412 from valentinewallace/2023-07-construct-blinded-paths

Add API for constructing blinded payment paths

diff --cc lightning/src/events/mod.rs
Simple merge

diff --cc lightning/src/ln/channelmanager.rs
Simple merge

diff --cc lightning/src/routing/gossip.rs
Simple merge

diff --cc lightning/src/routing/router.rs
Simple merge