[DO NOT MERGE YET] Enable std-backtrace.rs for i686 msvc

Author: jieyouxu

tests/ui/backtrace/std-backtrace.rs

@@ -3,7 +3,6 @@
 //@ ignore-wasm32 spawning processes is not supported
 //@ ignore-openbsd no support for libbacktrace without filename
 //@ ignore-sgx no processes
-//@ ignore-i686-pc-windows-msvc see #62897 and `backtrace-debuginfo.rs` test
 //@ ignore-fuchsia Backtraces not symbolized
 //@ compile-flags:-g
 //@ compile-flags:-Cstrip=none