test: update postmortem metadata test for V8 7.4

Summary of changes:

- v8dbg_class_FixedTypedArrayBase__external_pointer__Object
  - Type changed in v8/v8@f70bb59#diff-f3f182b0510ba2ee39ae87e421ff110b.
  - Use v8dbg_class_FixedTypedArrayBase__external_pointer__uintptr_t
- v8dbg_class_JSArrayBuffer__backing_store__Object
  - Type changed in v8/v8@f70bb59#diff-f3f182b0510ba2ee39ae87e421ff110b.
  - Use v8dbg_class_JSArrayBuffer__backing_store__uintptr_t
- v8dbg_class_Map__raw_instance_descriptors__DescriptorArray
  - Changed in v8/v8@d7b08b6#diff-59788e25dc5196c356894d5e1fac6425
  - New constant added to V8: v8dbg_class_Map__instance_descriptors_offset
- v8dbg_PointerSizeLog2
  - Changed in v8/v8@46d1986#diff-f3f182b0510ba2ee39ae87e421ff110b
  - Refs: https://bugs.chromium.org/p/v8/issues/detail?id=8477
  - Use new constants: v8dbg_SystemPointerSize, v8dbg_SystemPointerSizeLog2,
        v8dbg_TaggedSize, and v8dbg_TaggedSizeLog2

PR-URL: #26685
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>

test/v8-updates/test-postmortem-metadata.js

@@ -64,11 +64,11 @@ function getExpectedSymbols() {
     'v8dbg_class_FixedArray__data__uintptr_t',
     'v8dbg_class_FixedArrayBase__length__SMI',
     'v8dbg_class_FixedTypedArrayBase__base_pointer__Object',
-    'v8dbg_class_FixedTypedArrayBase__external_pointer__Object',
+    'v8dbg_class_FixedTypedArrayBase__external_pointer__uintptr_t',
     'v8dbg_class_HeapNumber__value__double',
     'v8dbg_class_HeapObject__map__Map',
     'v8dbg_class_JSArray__length__Object',
-    'v8dbg_class_JSArrayBuffer__backing_store__Object',
+    'v8dbg_class_JSArrayBuffer__backing_store__uintptr_t',
     'v8dbg_class_JSArrayBuffer__byte_length__size_t',
     'v8dbg_class_JSArrayBufferView__buffer__Object',
     'v8dbg_class_JSArrayBufferView__byte_length__size_t',
@@ -84,7 +84,7 @@ function getExpectedSymbols() {
     'v8dbg_class_Map__constructor_or_backpointer__Object',
     'v8dbg_class_Map__inobject_properties_start_or_constructor_function_index__char',
     'v8dbg_class_Map__instance_type__uint16_t',
-    'v8dbg_class_Map__raw_instance_descriptors__DescriptorArray',
+    'v8dbg_class_Map__instance_descriptors_offset',
     'v8dbg_class_Map__instance_size_in_words__char',
     'v8dbg_class_Oddball__kind_offset__int',
     'v8dbg_class_Script__line_ends__Object',
@@ -179,7 +179,10 @@ function getExpectedSymbols() {
     'v8dbg_OddballUndefined',
     'v8dbg_OddballUninitialized',
     'v8dbg_OneByteStringTag',
-    'v8dbg_PointerSizeLog2',
+    'v8dbg_SystemPointerSize',
+    'v8dbg_SystemPointerSizeLog2',
+    'v8dbg_TaggedSize',
+    'v8dbg_TaggedSizeLog2',
     'v8dbg_SeqStringTag',
     'v8dbg_SlicedStringTag',
     'v8dbg_SmiShiftSize',