sched/debug: Remove CONFIG_SCHED_DEBUG from self-test config files

We leave most of the defconfigs alone (there's over 70 of them),
but let's remove CONFIG_SCHED_DEBUG from the scheduler self-test
Kconfig files.

Signed-off-by: Ingo Molnar <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Juri Lelli <[e-mail]>
Cc: Vincent Guittot <[e-mail]>
Cc: Dietmar Eggemann <[e-mail]>
Cc: Steven Rostedt <[e-mail]>
Cc: Ben Segall <[e-mail]>
Cc: Mel Gorman <[e-mail]>
Cc: Valentin Schneider <[e-mail]>
Cc: Linus Torvalds <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

tools/testing/selftests/sched/config

···
-CONFIG_SCHED_DEBUG=y
+# empty

tools/testing/selftests/sched_ext/config

···
-CONFIG_SCHED_DEBUG=y
 CONFIG_SCHED_CLASS_EXT=y
 CONFIG_CGROUPS=y
 CONFIG_CGROUP_SCHED=y

tools/testing/selftests/wireguard/qemu/debug.config

···
 CONFIG_DEBUG_STACK_USAGE=y
 CONFIG_DEBUG_SHIRQ=y
 CONFIG_WQ_WATCHDOG=y
-CONFIG_SCHED_DEBUG=y
 CONFIG_SCHED_INFO=y
 CONFIG_SCHEDSTATS=y
 CONFIG_SCHED_STACK_END_CHECK=y