Do not run for "old" GTS and "new" Clang

Clang 16 support appeared only after GTS 12.1:
https://sourceware.org/cgit/annobin/commit/?id=a75f3a2ee0fd67e7ccd297103c0dd9a23880af31

Regression/testsuite/main.fmf

@@ -37,6 +37,10 @@ adjust:
     when: distro < rhel-7
     continue: false
     because: known to fail, won't be fixed (RHBZ#2040688 and others)
+  - enabled: false
+    when: collection == gcc-toolset-11, gcc-toolset-12 and distro == rhel-9 and distro > rhel-9.2
+    continue: false
+    because: known to fail with Clang > 15
 extra-nitrate: TC#0590691
 extra-summary: /tools/annobin/Regression/testsuite
 extra-task: /tools/annobin/Regression/testsuite