test: remove test-tty-wrap from status file

The test is believed to no longer be unreliable on AIX. Remove the flaky
designation from the appropriate status file.

Closes: #9728

PR-URL: #28129
Fixes: #9728
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/pseudo-tty/pseudo-tty.status

@@ -1,8 +1,6 @@
 prefix pseudo-tty
 
 [$system==aix]
-# being investigated under https://github.com/nodejs/node/issues/9728
-test-tty-wrap              : FAIL, PASS
 
 [$system==solaris]
 # https://github.com/nodejs/node/pull/16225 - `ioctl(fd, TIOCGWINSZ)` seems