Bug #45771 AIX and i5/OS Perl bug: check_socket_path_length in MTR fails

Bug in Perl
Scrap attempt to do this smartly on AIX, just drop the test and assume it's OK
This commit undoes the previous push and adds a line to ignore on AIX

mysql-test/lib/My/Platform.pm

@@ -106,10 +106,13 @@ sub check_socket_path_length {
   my ($path)= @_;
 
   return 0 if IS_WINDOWS;
+  # This may not be true, but we can't test for it on AIX due to Perl bug
+  # See Bug #45771
+  return 0 if ($^O eq 'aix');
 
   require IO::Socket::UNIX;
 
-  my $truncated= 1; # Be negative
+  my $truncated= undef;
 
   # Create a tempfile name with same length as "path"
   my $tmpdir = tempdir( CLEANUP => 0);
@@ -122,32 +125,20 @@ sub check_socket_path_length {
        Local => $testfile,
        Listen => 1,
       );
+    $truncated= 1; # Be negatvie
 
     die "Could not create UNIX domain socket: $!"
       unless defined $sock;
 
-    my $hostpath = eval {$sock->hostpath()};
-    if ($@) {
-      die unless $@ =~ /^Bad arg length for Socket::unpack_sockaddr_un/;
-
-      # Bug on AIX and i5/OS Perl IO::Socket::UNIX which dies with something
-      # like:
-      #   Bad arg length for Socket::unpack_sockaddr_un, length is 25,
-      #   should be 106 at /path/to/perl/lib/5.8.0/aix/Socket.pm line 380.
-      #
-      # Just fake it that everything is fine
-      $hostpath = $testfile;
-    }
-
     die "UNIX domain socket path was truncated"
-      unless ($testfile eq $hostpath);
+      unless ($testfile eq $sock->hostpath());
 
     $truncated= 0; # Yes, it worked!
 
   };
 
   die "Unexpected failure when checking socket path length: $@"
-    if $@ and $@ !~ /^UNIX domain socket path was truncated/;
+    if $@ and not defined $truncated;
 
   $sock= undef;  # Close socket
   rmtree($tmpdir); # Remove the tempdir and any socket file created