tsan: strip top inlined internal frames

The new GET_CURRENT_PC() can lead to spurious top inlined internal frames.
Here are 2 examples from bots, in both cases the malloc is supposed to be
the top frame (#0):

  WARNING: ThreadSanitizer: signal-unsafe call inside of a signal
    #0 __sanitizer::StackTrace::GetNextInstructionPc(unsigned long)
    #1 malloc

  Location is heap block of size 99 at 0xbe3800003800 allocated by thread T1:
    #0 __sanitizer::StackTrace::GetNextInstructionPc(unsigned long)
    #1 malloc

Let's strip these internal top frames from reports.
With other code changes I also observed some top frames
from __tsan::ScopedInterceptor, proactively remove these as well.

Differential Revision: https://reviews.llvm.org/D106081