Add multilib-rpm-config to exclude list for RHEL11

Author: tstellar

configs/rhel-pt-llvm-rust--multilib-unwanted.yaml

@@ -0,0 +1,10 @@
+document: feedback-pipeline-unwanted
+version: 1
+data:
+  name: Exclude multilib-rpm-config
+  description: There are no more 32-bit builds for RHEL, so this package is not needed.
+  maintainer: rhel-pt-llvm-rust
+  unwanted_packages:
+    - multilib-rpm-config
+  labels:
+    - eln