Revisit interpret loop optimizations

## Context The interpreter loop got about ~10% performance regression between emulator 0.19 and 0.20. This happened after the refactoring we made in the interpreter to make the TLB code more sane and encapsulated access to address offsets through `host_addr` type. ## Possible solutions Investigate what assembly instructions were added by tracing the host amd64/arm64 instructions when running the interpreter between emulator releases. Then come up with a code refactor to save host instructions in the interpreter hot loop while retaining code clarity and sanity (no crazy hacks for performance).