Add another test ignore

Author: bjorn3

tests/ui/alloc-error/alloc-error-backtrace.rs

@@ -21,6 +21,7 @@
 // `i686-mingw` (32-bit windows-gnu)? cc #128911.
 //@ ignore-windows-gnu
 //@ ignore-backends: gcc
+//@ ignore-msvc see #62897 and `backtrace-debuginfo.rs` test
 
 use std::alloc::{Layout, handle_alloc_error};
 use std::process::Command;