Follow Path Constraint (Editor & CPP Runtime)

This PR includes a bunch of unrelated core defs that were missing from the CPP runtime to bring us up to date. Requirements and test cases here: https://www.notion.so/rive-app/FollowPathConstraint-8a1de3aa7494461c8ba79b8915acfd9d?pvs=4

Diffs=
dcf320c64 Follow Path Constraint (Editor & CPP Runtime) (#5510)