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/file/src/CMakeLists.txt

@@ -50,6 +50,7 @@ set (WAMR_BUILD_INTERP 1)
 set (WAMR_BUILD_AOT 1)
 set (WAMR_BUILD_JIT 0)
 set (WAMR_BUILD_LIBC_BUILTIN 1)
+set (WAMR_BUILD_REF_TYPES 1)
 
 if (NOT MSVC)
   set (WAMR_BUILD_LIBC_WASI 1)