tests/ui/sanitizer/hwaddress.rs: Run on aarch64 and remove cgu hack

The upstream LLVM bug has been fixed: TODO

Author: Enselic

tests/ui/sanitizer/hwaddress.rs

@@ -1,11 +1,7 @@
 //@ needs-sanitizer-support
 //@ needs-sanitizer-hwaddress
 //
-// FIXME(#83706): this test triggers errors on aarch64-gnu
-//@ ignore-aarch64-unknown-linux-gnu
-//
-// FIXME(#83989): codegen-units=1 triggers linker errors on aarch64-gnu
-//@ compile-flags: -Z sanitizer=hwaddress -O -g -C codegen-units=16 -C unsafe-allow-abi-mismatch=sanitizer
+//@ compile-flags: -Z sanitizer=hwaddress -O -g -C unsafe-allow-abi-mismatch=sanitizer
 //
 //@ run-fail
 //@ error-pattern: HWAddressSanitizer: tag-mismatch