[ VM / Profiler ] Don't delete sample buffer during VM cleanup
[ VM / Profiler ] Don't delete sample buffer during VM cleanup

TEST=vm/cc/Profiler_BasicSourcePositionOptimized,vm/cc/Profiler_BinaryOperatorSourcePositionOptimized

Fixes https://github.com/dart-lang/sdk/issues/46657

Change-Id: Ic6604c1c889ad846d47918452adec91e8f36aece
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/207364
Reviewed-by: Ryan Macnak <d738b7f001baf9789095d7dc549cff6de60b011d@google.com>
Commit-Queue: Ben Konyi <67ffcaedcc3dc3d87dddb9627b72dd41756b31b1@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk