[Wasm RyuJIT] Add some missing types to ins_Load and ins_Store (#122994)

We get a bunch of asserts when doing superpmi replays, from TYP_REF ending up in here.

Author: kg

src/coreclr/jit/instr.cpp

@@ -2101,6 +2101,9 @@ instruction CodeGenInterface::ins_Load(var_types srcType, bool aligned /*=false*
 #if defined(TARGET_WASM)
     switch (srcType)
     {
+        case TYP_REF:
+        case TYP_BYREF:
+            return ins_Load(TYP_I_IMPL, aligned);
         case TYP_INT:
             return INS_i32_load;
         case TYP_LONG:
@@ -2501,6 +2504,9 @@ instruction CodeGenInterface::ins_Store(var_types dstType, bool aligned /*=false
 #if defined(TARGET_WASM)
     switch (dstType)
     {
+        case TYP_REF:
+        case TYP_BYREF:
+            return ins_Store(TYP_I_IMPL, aligned);
         case TYP_INT:
             return INS_i32_store;
         case TYP_LONG: