Failures on [lib] Avoid empty stack-traces in Stream methods

[alexmarkov]

There are new test failures on [lib] Avoid empty stack-traces in Stream methods.

The tests

vm/dart/awaiter_stacks/stream_methods_test/0 RuntimeError (expected Pass)
vm/dart/awaiter_stacks/stream_methods_test/1 RuntimeError (expected Pass)

are failing on configurations

vm-aot-dwarf-linux-product-x64
vm-aot-linux-product-x64
vm-aot-mac-product-arm64

stdout:
STACK TRACE MISMATCH -----------------
GOT:
#0    Stream.single.<anonymous closure> (stream.dart)
<asynchronous suspension>
#1    runTest (%test%)
<asynchronous suspension>
#2    main (%test%)
<asynchronous suspension>
EXPECTED:
#0    Stream.last.<anonymous closure> (stream.dart)
<asynchronous suspension>
#1    runTest (%test%)
<asynchronous suspension>
#2    main (%test%)
<asynchronous suspension>
--------------------------------------
To regenate expectations run:
$ out/ProductX64/dartaotruntime -Dupdate.expectations=true file:///b/s/w/ir/out/ProductX64/generated_compilations/vm-aot-linux-product-x64/runtime_tests_vm_dart_awaiter_stacks_stream_methods_test/libout.so
--------------------------------------

stderr:
Unhandled exception:
Expect.equals(at index 7: Expected <...Stream.last.<anonymous closure>...>, Found: <...Stream.single.<anonymous closure>...>, 'at frame #0 mismatched function name') fails.
#0      Expect._fail (package:expect/expect.dart:891)
#1      Expect._failNotEqual (package:expect/expect.dart:169)
#2      Expect.equals (package:expect/expect.dart:157)
#3      checkExpectedStack (file:///b/s/w/ir/runtime/tests/vm/dart/awaiter_stacks/harness.dart:193)
<asynchronous suspension>
#4      runTest (file:///b/s/w/ir/runtime/tests/vm/dart/awaiter_stacks/stream_methods_test.dart:51)
<asynchronous suspension>
#5      main (file:///b/s/w/ir/runtime/tests/vm/dart/awaiter_stacks/stream_methods_test.dart:88)
<asynchronous suspension>

--- Re-run this test:
python3 tools/test.py -n vm-aot-linux-product-x64 vm/dart/awaiter_stacks/stream_methods_test/0

It looks like the new test case added in 505f08b is failing in product mode.

@mraleph Could you take a look?