All statement nodes in Painless contain a Location object that describes information about what generated the statement including a character offset and possibly a source code snippet. Currently, during ASM writing we check to ensure there are no statement offsets that collide with each other with an assert. We need a way to mark a statement as internal since we are going to decorate the ir tree with statements generated by code as opposed to a user. Collision detection can then ignore any internal statements.

Relates to: #49869