Add a runs-per-test option to perf test inorder to better diagnose
flakes. Each runs executes as if it were a different test, the tests
appear together in the output:

```
$ perf test -r 3 lbr -v
122: perf record LBR tests                                           : Ok
122: perf record LBR tests                                           : Ok
122: perf record LBR tests                                           : Ok
```

v4: Fix crash in dont_fork mode caused by cleanup work.
v3: Improve perf test documentation, including for the new option, and
    add some example output to the commit messages as requested by
    Namhyung.
v2: In the v1 patch Kan and I noted cleanup that would make the code
    cleaner and less indented:
    https://lore.kernel.org/lkml/20241109160219.49976-1-irogers@google.com/
    Add patches doing some builtin-test.c cleanup and then add the
    runs-per-test flag.

Ian Rogers (5):
  perf test: Rename functions and variables for better clarity
  perf test: Send list output to stdout rather than stderr
  perf test: Remove parallel option documentation
  perf test: Add a runs-per-test flag
  perf test: Improve verbose documentation

 tools/perf/Documentation/perf-test.txt |  20 ++-
 tools/perf/tests/builtin-test.c        | 223 ++++++++++++-------------
 2 files changed, 119 insertions(+), 124 deletions(-)

-- 
2.47.1.613.gc27f4b7a9f-goog