Merge branch 'egil/eprof' into dev

* egil/eprof:
  Fix eprof to handle error cases
  Dialyzer cleanup for eprof
  Fix fprof_SUITE to use new eprof API
  Switch pattern API for eprof profile with mfa
  Update eprof documentation
  Update eprof_SUITE with more basic tests
  Rename sorting choices for eprof
  Teach eprof to align text output
  Add dump functionality to eprof
  Add log functionality to eprof
  Update eprof tests to reflect new eprof
  Add start timestamp to eprof profiling
  Teach eprof to use the new breakpoints

OTP-8706 egil/eprof

eprof has been reimplemented with support in the Erlang virtual machine and
is now both faster (i.e. slows down the code being measured less) and
scales much better. In measurements we saw speed-ups compared to the old
eprof ranging from 6 times (for sequential code that only uses one
scheduler/core) up to 84 times (for parallel code that uses 8 cores).

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