kernel/debug: Report team/thread exit status

Add a field to `debug_[team/thread]_deleted` to report the exit status
on the corresponding events.

This is useful for debuggers like GDB expecting a return value when one
of their inferiors quit.

Also add a `usage` field to `debug_team_deleted` since this is another
potentially useful piece of information exposed by the `waitpid` family
of syscalls.

Change-Id: Ieff7c31f56b1b9f8f709725d19050273b21f2504
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7736
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: waddlesplash <[email protected]>

headers/os/kernel/debugger.h

@@ -560,6 +560,8 @@ typedef struct {
 typedef struct {
 	debug_origin	origin;			// thread is < 0, team is the deleted team
 									// (asynchronous message)
+	status_t		status;			// the exit code of the team
+	team_usage_info	usage;			// the usage info of the team
 } debug_team_deleted;
 
 // B_DEBUGGER_MESSAGE_TEAM_EXEC
@@ -580,6 +582,7 @@ typedef struct {
 
 typedef struct {
 	debug_origin	origin;			// the deleted thread (asynchronous message)
+	status_t		status;			// the exit code of the thread
 } debug_thread_deleted;
 
 // B_DEBUGGER_MESSAGE_IMAGE_CREATED