fix(ext/node): util.types.isSharedArrayBuffer

[kt3k]

part of #17779

This fixes node compat test case cli/tests/node_compat/test/parallel/test-util-types.js.

util.types.isSharedArrayBuffer was broken because SharedArrayBuffer is unavailable during snapshotting. This fixes it by avoiding caching _getSharedArrayBufferByteLength during snapshotting

[petamoriken]

How about the following code?

// https://tc39.es/ecma262/#sec-get-sharedarraybuffer.prototype.bytelength
let _getSharedArrayBufferByteLength;

export function isSharedArrayBuffer(
  value: unknown,
): value is SharedArrayBuffer {
  // TODO: add SharedArrayBuffer to primordials
  _getSharedArrayBufferByteLength ??= Object.getOwnPropertyDescriptor(
    SharedArrayBuffer.prototype,
    "byteLength",
  )!.get!;

  try {
    _getSharedArrayBufferByteLength.call(value);
    return true;
  } catch {
    return false;
  }

[kt3k]

Thanks! Updated the PR to use it

[bartlomieju]

LGTM, thanks!