Fix various issues found in `full_stack_target` fuzzing#2808

Merged

TheBlueMatt merged 6 commits intolightningdevkit:mainfrom TheBlueMatt:2023-12-fuzzing-fixes-1

Jan 8, 2024

+91-49

Commits on Dec 24, 2023

Fix Feature eq + hash to ignore excess zero bytes
TheBlueMatt
committed

Commits on Jan 8, 2024

Fix reachable unwrap on non-channel_type manual channel acceptance
TheBlueMatt
committed