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: v8/v8@39e2d97
Refs: v8/v8@467eb14
Refs: v8/v8@c51bcd1

PR-URL: #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>

Author: cjihrig

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

@@ -95,12 +95,12 @@ function getExpectedSymbols() {
     'v8dbg_class_SeqTwoByteString__chars__char',
     'v8dbg_class_SharedFunctionInfo__function_data__Object',
     'v8dbg_class_SharedFunctionInfo__flags__int',
-    'v8dbg_class_SharedFunctionInfo__end_position__int',
-    'v8dbg_class_SharedFunctionInfo__function_identifier__Object',
+    'v8dbg_class_UncompiledData__end_position__int32_t',
+    'v8dbg_class_SharedFunctionInfo__function_identifier_or_debug_info__Object',
     'v8dbg_class_SharedFunctionInfo__internal_formal_parameter_count__uint16_t',
     'v8dbg_class_SharedFunctionInfo__name_or_scope_info__Object',
     'v8dbg_class_SharedFunctionInfo__script__Object',
-    'v8dbg_class_SharedFunctionInfo__start_position_and_type__int',
+    'v8dbg_class_UncompiledData__start_position__int32_t',
     'v8dbg_class_SlicedString__offset__SMI',
     'v8dbg_class_SlicedString__parent__String',
     'v8dbg_class_String__length__SMI',
@@ -150,9 +150,6 @@ function getExpectedSymbols() {
     'v8dbg_scopeinfo_idx_first_vars',
     'v8dbg_scopeinfo_idx_ncontextlocals',
     'v8dbg_scopeinfo_idx_nparams',
-    'v8dbg_scopeinfo_idx_nstacklocals',
-    'v8dbg_sharedfunctioninfo_start_position_mask',
-    'v8dbg_sharedfunctioninfo_start_position_shift',
     'v8dbg_type_Code__CODE_TYPE',
     'v8dbg_type_FixedArray__FIXED_ARRAY_TYPE',
     'v8dbg_type_HeapNumber__HEAP_NUMBER_TYPE',