i#5740: Add failing attach_* tests to ignore list

Adds the failing attach_test and attach_blocking tests to the ignore
list for AArch64. This is a temporary measure to unblock PRs.

Issue: #5740

suite/runsuite_wrapper.pl

@@ -336,6 +336,8 @@
                                    'code_api|linux.fib-conflict-early' => 1,
                                    'code_api|linux.mangle_asynch' => 1,
                                    'code_api,tracedump_text,tracedump_origins,syntax_intel|common.loglevel' => 1, # i#1807
+                                   'code_api|client.attach_test' => 1, # i#5740
+                                   'code_api|client.attach_blocking' => 1, # i#5740
                                    );
             if ($is_32) {
                 $issue_no = "#2416";