Merge pull request #2696 from TheBlueMatt/2023-10-no-chan-feerate-upper-bound

Drop non-anchor channel fee upper bound limit entirely

diff --cc fuzz/src/chanmon_consistency.rs
Simple merge

diff --cc fuzz/src/full_stack.rs
Simple merge

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

diff --cc lightning/src/util/test_utils.rs
Simple merge