Reverts bytecodealliance/wasm-micro-runtime#1714, which was merged mistakenly.
Basically implement the Multi-tier JIT engine. And update document and wamr-test-suites script.
Import WAMR Fast JIT which is a lightweight JIT with quick startup, small footprint, relatively good performance (~40% to ~50% of LLVM JIT) and good portability. Platforms supported: Linux, MacOS and Linux SGX. Arch supported: x86-64.