perf tp_pmu: Factor existing tracepoint logic to new file

Start the creation of a tracepoint PMU abstraction. Tracepoint events
don't follow the regular sysfs perf conventions. Eventually the new
PMU abstraction will bridge the gap so tracepoint events look more
like regular perf ones.

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: https://lore.kernel.org/r/20250725185202.68671-5-irogers@google.com


Signed-off-by: Namhyung Kim <namhyung@kernel.org>