test: mark two tests as flaky in AIX

sequential/test-inspector-debug-end and
parallel/test-child-process-execfile

Off late these have been failing in AIX. Debugging core dump
suggested that this is a side effect of exit-race that is
described in #25007
Mart these  as flaky in AIX until that is resolved.

Refs: #25047
Refs: #25029

PR-URL: #25126
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>

Author: gireeshpunathil

test/parallel/parallel.status

@@ -34,3 +34,5 @@ test-cli-node-options: PASS,FLAKY
 [$system==freebsd]
 
 [$system==aix]
+# https://github.com/nodejs/node/issues/25029
+test-child-process-execfile: PASS,FLAKY

test/sequential/sequential.status

@@ -28,5 +28,7 @@ test-http2-large-file: PASS, FLAKY
 [$system==aix]
 # https://github.com/nodejs/node/issues/24921
 test-child-process-execsync: PASS, FLAKY
+# https://github.com/nodejs/node/issues/25047
+test-inspector-debug-end: PASS, FLAKY
 
 [$arch==arm]