fix(profiling): exception sampling for stack v2

[taegyunkim]

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[github-actions]

CODEOWNERS have been resolved as:

ddtrace/internal/datadog/profiling/stack_v2/include/stack_renderer.hpp  @DataDog/profiling-python
ddtrace/internal/datadog/profiling/stack_v2/src/stack_renderer.cpp      @DataDog/profiling-python