Refine AOT/JIT code call wasm-c-api import process (#2982)

Allow to invoke the quick call entry wasm_runtime_quick_invoke_c_api_import to
call the wasm-c-api import functions to speedup the calling process, which reduces
the data copying.

Use `wamrc --invoke-c-api-import` to generate the optimized AOT code, and set
`jit_options->quick_invoke_c_api_import` true in wasm_engine_new when LLVM JIT
is enabled.

core/iwasm/include/aot_export.h

@@ -58,6 +58,7 @@ typedef struct AOTCompOption {
     bool disable_llvm_lto;
     bool enable_llvm_pgo;
     bool enable_stack_estimation;
+    bool quick_invoke_c_api_import;
     char *use_prof_file;
     uint32_t opt_level;
     uint32_t size_level;

core/iwasm/include/wasm_c_api.h

@@ -417,6 +417,7 @@ struct wasm_ref_t;
 
 typedef struct wasm_val_t {
   wasm_valkind_t kind;
+  uint8_t __paddings[7];
   union {
     int32_t i32;
     int64_t i64;

core/iwasm/include/wasm_export.h

@@ -199,6 +199,7 @@ struct wasm_ref_t;
 
 typedef struct wasm_val_t {
     wasm_valkind_t kind;
+    uint8_t __paddings[7];
     union {
         /* also represent a function index */
         int32_t i32;