[llvm] [CodeGen] Ignore `ANNOTATION_LABEL` in scheduler (PR #190499)

[Eli Friedman via llvm-commits]

================
@@ -0,0 +1,13 @@
+; RUN: llc -mtriple=thumbv7-windows-msvc -O1 < %s
+
+; No check in a crash test
----------------
efriedma-quic wrote:

If we're going to add a test, we should verify the functionality the functionality works (similar to llvm/test/CodeGen/X86/label-annotation.ll).

https://github.com/llvm/llvm-project/pull/190499