Implement GC (Garbage Collection) feature for interpreter, AOT and LLVM-JIT (#3125)

Implement the GC (Garbage Collection) feature for interpreter mode,
AOT mode and LLVM-JIT mode, and support most features of the latest
spec proposal, and also enable the stringref feature.

Use `cmake -DWAMR_BUILD_GC=1/0` to enable/disable the feature,
and `wamrc --enable-gc` to generate the AOT file with GC supported.

And update the AOT file version from 2 to 3 since there are many AOT
ABI breaks, including the changes of AOT file format, the changes of
AOT module/memory instance layouts, the AOT runtime APIs for the
AOT code to invoke and so on.

samples/multi-module/CMakeLists.txt

@@ -49,6 +49,8 @@ endif ()
 if (NOT DEFINED WAMR_BUILD_JIT)
   set(WAMR_BUILD_JIT 0)
 endif ()
+set(WAMR_BUILD_SIMD 1)
+set(WAMR_BUILD_REF_TYPES 1)
 set(WAMR_BUILD_LIBC_BUILTIN 1)
 set(WAMR_BUILD_LIBC_WASI 1)
 set(WAMR_BUILD_MULTI_MODULE 1)