[Local GC] Move knowledge of the free object method table outside of the GC (#10755)

[Local GC] Move knowledge of the free object method table outside of the GC (#10755)

* [Local GC] Move knowledge of the free object method table outside of the GC

* Revert "[Local GC] Move knowledge of the free object method table outside of the GC"

This reverts commit 02979e5eb12dd44edb2603e16411dd7d7ffc377d.

* Address code review feedback: leave ArrayBase alone, as it should be part of the binary contract between the EE and the GC

* Correct a bad merge