base: Eliminate pinned allocations from IntTable
This replaces the ForeignPtr used to track IntTable's pointer size with a single-entry mutable ByteArray#, eliminating the fragmentation noted in #19171 (closed).
Fixes #19171 (closed).
This replaces the ForeignPtr used to track IntTable's pointer size with a single-entry mutable ByteArray#, eliminating the fragmentation noted in #19171 (closed).
Fixes #19171 (closed).