test: update postmortem metadata test for V8 6.9

The V8 6.9 update requires the following adjustments to the
postmortem debugging metadata constants:

- v8dbg_class_SharedFunctionInfo__function_identifier__Object
  Use: v8dbg_class_SharedFunctionInfo__function_identifier_or_debug_info__Object

- v8dbg_class_SharedFunctionInfo__end_position__int
  Use: v8dbg_class_UncompiledData__end_position__int32_t

- v8dbg_class_SharedFunctionInfo__start_position_and_type__int
  Use: v8dbg_class_UncompiledData__start_position__int32_t

- v8dbg_sharedfunctioninfo_start_position_mask and
- v8dbg_sharedfunctioninfo_start_position_shift
  Removed. Use: v8dbg_class_UncompiledData__start_position__int32_t

- v8dbg_scopeinfo_idx_nstacklocals has been removed

Refs: https://github.com/v8/v8/commit/39e2d97bc4d6b35be40294f06873f03b0368ce5c
Refs: https://github.com/v8/v8/commit/467eb1497e998dd73a4006cf0655fd0ca289b6f4
Refs: https://github.com/v8/v8/commit/c51bcd17bb4da87e1b9bf067351f0fc5cce4bbd5

PR-URL: https://github.com/nodejs/node/pull/21983


Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>