perf test: Remove C test wrapper for attr.py

Remove the C wrapper now a shell script wrapper exists. Move
perf_event_attr dumping functions to evsel.c and reduce the scope of
variables/defines. Use fprintf to avoid snprintf complexities in
WRITE_ASS.

Add __SANE_USERSPACE_TYPES__ to evsel.c to fix format flag issues on
PowerPC triggered by moving attr.c functions to evsel.c.

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: zhaimingbing <zhaimingbing@cmss.chinamobile.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ze Gao <zegao2021@gmail.com>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Veronika Molnarova <vmolnaro@redhat.com>
Link: https://lore.kernel.org/r/20241015000158.871828-3-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

tools/perf/tests/Build

@@ -4,7 +4,6 @@ perf-test-y += builtin-test.o
 perf-test-y += tests-scripts.o
 perf-test-y += parse-events.o
 perf-test-y += dso-data.o
-perf-test-y += attr.o
 perf-test-y += vmlinux-kallsyms.o
 perf-test-$(CONFIG_LIBTRACEEVENT) += openat-syscall.o
 perf-test-$(CONFIG_LIBTRACEEVENT) += openat-syscall-all-cpus.o