Failures on [VM] Introduce `--profile-startup` CLI flag

[a-siva]

There are new test failures on [VM] Introduce --profile-startup CLI flag...[DAS] Starts refactoring tests migration to TestCode markers.

The tests

pkg/vm_service/test/profile_startup_cli_flag_test RuntimeError (expected Pass)

are failing on configurations

vm-aot-mac-release-arm64
vm-aot-win-release-x64

[alexmarkov]

pkg/vm_service/test/profile_startup_cli_flag_test turned Pass -> RuntimeError on vm-aot-win-release-x64 once again:

Requesting CPU samples within the filter window of timeOriginNanos=25589959536000 and timeExtentNanos=9993650000

The returned CPU samples span a time window of timeOriginNanos=25589959536000 and timeExtentNanos=9993650000

00:10 �[32m+0�[0m�[31m -1�[0m: out.dll �[1m�[31m[E]�[0m�[0m

  Expected: <535>
    Actual: <537>
  

  package:matcher/src/expect/expect.dart 152                 fail
  package:matcher/src/expect/expect.dart 147                 _expect
  package:matcher/src/expect/expect.dart 56                  expect
  pkg\vm_service\test\profile_startup_cli_flag_test.dart 88  tests.<fn>
  ===== asynchronous gap ===========================
  pkg\vm_service\test\common\test_helper.dart 375            _ServiceTesterRunner.run.<fn>
  ===== asynchronous gap ===========================
  package:test_api/src/backend/declarer.dart 242             Declarer.test.<fn>.<fn>
  ===== asynchronous gap ===========================
  package:test_api/src/backend/declarer.dart 240             Declarer.test.<fn>
  ===== asynchronous gap ===========================
  package:test_api/src/backend/invoker.dart 282              Invoker._waitForOutstandingCallbacks.<fn>
  

All service tests completed successfully.

** Killing script

00:10 �[32m+0�[0m�[31m -1�[0m: �[31mSome tests failed.�[0m



Consider enabling the flag chain-stack-traces to receive more detailed exceptions.
For example, 'dart test --chain-stack-traces'.

stderr:
Unhandled exception:
Dummy exception to set exit code.

--- Re-run this test:
python3 tools/test.py -n vm-aot-win-release-x64 pkg/vm_service/test/profile_startup_cli_flag_test

log