[Web] Fix incorrect FFI export name in runtime.ts (#18686)

## Why

The code was using the TypeScript type name
`FTVMFFIErrorSetRaisedFromCStr` instead of the actual C function export
name `TVMFFIErrorSetRaisedFromCStr`. The F prefix is a naming convention
for TypeScript function types, not the actual export names, which would
make RPC run into error in my local test.
## How

`lib.exports.FTVMFFIErrorSetRaisedFromCStr` -->
`lib.exports.TVMFFIErrorSetRaisedFromCStr` to match the C function name
defined in ctypes.ts.

Author: guan404ming

web/src/runtime.ts

@@ -2146,7 +2146,7 @@ export class Instance implements Disposable {
         const errMsgOffset = stack.allocRawBytes(errMsg.length + 1);
         stack.storeRawBytes(errMsgOffset, StringToUint8Array(errMsg));
         stack.commitToWasmMemory();
-        (this.lib.exports.FTVMFFIErrorSetRaisedFromCStr as ctypes.FTVMFFIErrorSetRaisedFromCStr)(
+        (this.lib.exports.TVMFFIErrorSetRaisedFromCStr as ctypes.FTVMFFIErrorSetRaisedFromCStr)(
           stack.ptrFromOffset(errKindOffset),
           stack.ptrFromOffset(errMsgOffset)
         );