Use "out.aotsnapshot" as the name for all non-assembled snapshots and
names with the appropriate shared object extension for the host OS for
assembled snapshots.
This ensures the test checks for .dll extensions added in
https://dart-review.googlesource.com/c/sdk/+/428200 only trigger
for assembled snapshots as expected, and not for other formats
(e.g., Windows trybots using sanitizers, which still use direct
to ELF snapshots).
Also fixes incorrect line numbers in dwarf_stack_trace_test.dart.
TEST=vm/dart/build_id_test
standalone/dwarf_stack_trace_test
Cq-Include-Trybots: luci.dart.try:vm-asan-win-release-x64-try,vm-linux-release-x64-try,vm-mac-release-arm64-try
Bug: https://github.com/dart-lang/sdk/issues/60846
Change-Id: Ife06613d86874d76adeb99dcbc50fc3723aae584
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/432660
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Tess Strickland
f8e21c5c94