fix mismatch between ExprTypeName and ExprType

[Inginnng]

#2631 There is an inconsistency between the order of enum values in ExprType (defined in ir.h) and the corresponding string names in ExprTypeName array (defined in ir.cc). This causes GetExprTypeName() to return incorrect string representations for atomic operation related expression types.
In ir.h (ExprType enum):

enum class ExprType {
  AtomicLoad,        // index 0
  AtomicRmw,         // index 1  
  AtomicRmwCmpxchg,  // index 2
  AtomicStore,       // index 3
  AtomicNotify,      // index 4
  AtomicFence,       // index 5
  AtomicWait,        // index 6
  // ... rest of enum values
};

In ir.cc (ExprTypeName array):

const char* ExprTypeName[] = {
    "AtomicFence",     // index 0 - should correspond to AtomicLoad
    "AtomicLoad",      // index 1 - should correspond to AtomicRmw
    "AtomicRmw",       // index 2 - should correspond to AtomicRmwCmpxchg
    "AtomicRmwCmpxchg", // index 3 - should correspond to AtomicStore
    "AtomicStore",     // index 4 - should correspond to AtomicNotify
    "AtomicNotify",    // index 5 - should correspond to AtomicFence
    "AtomicWait",      // index 6 - correct position
    // ... rest matches correctly
};

The error occurs in these functions:
In ir.cc:

const char* GetExprTypeName(ExprType type) {
  static_assert(WABT_ENUM_COUNT(ExprType) == WABT_ARRAY_SIZE(ExprTypeName),
                "Malformed ExprTypeName array");
  return ExprTypeName[size_t(type)];  // Returns wrong name due to index mismatch
}

const char* GetExprTypeName(const Expr& expr) {
  return GetExprTypeName(expr.type());  // Inherits the same issue
}

[sbc100]

lgtm.

I guess we don't have any tests that cover this?

[sbc100]

Looking into the CI issues here: #2633

[Inginnng]

fine, I found a timeout issue after uploading yesterday. I conducted three local tests, and the timeout error did not occur in any of them. and, I am not using macOS. so I didn't find the error in macOS build. thx for answering the CI issues.