test: update postmortem metadata test for V8 7.1

The V8 7.1 update requires the following adjustments to the
postmortem debugging metadata constants:

- v8dbg_class_JSArrayBuffer__byte_length__Object
  Use: v8dbg_class_JSArrayBuffer__byte_length__size_t

- v8dbg_class_JSArrayBufferView__raw_byte_length__Object
  Use: v8dbg_class_JSArrayBufferView__byte_length__size_t

- v8dbg_class_JSArrayBufferView__raw_byte_offset__Object
  Use: v8dbg_class_JSArrayBufferView__byte_offset__size_t

- v8dbg_class_String__length__SMI
  Use: v8dbg_class_String__length__int32_t

Refs: https://github.com/v8/v8/commit/5cfe1a6b121ad004ec3d73b137f84f558aac0efd
Refs: https://github.com/v8/v8/commit/c7a0049e1b70e8f455229c8a470df605ea064f70

PR-URL: https://github.com/nodejs/node/pull/23423


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Myles Borins <myles.borins@gmail.com>