Rollup merge of #154386 - ujjwalvishwakarma2006:migrate-ui-tests, r=Kivooeo

Migrate UI tests

In this pull request, I am migrating the following files and adding a comment at the top, including a link to the issue they were regression tests for:
- `tests/ui/issues/issue-4735.rs` ➝ `tests/ui/drop/drop-noncopyable-raw-pointer.rs`
- `tests/ui/issues/issue-17734.rs` ➝ `tests/ui/codegen/box-str-drop-glue.rs`

r? Kivooeo

tests/ui/codegen/box-str-drop-glue.rs

@@ -1,3 +1,4 @@
+//! regression test for <https://github.com/rust-lang/rust/issues/17734>
 //@ run-pass
 // Test that generating drop glue for Box<str> doesn't ICE
 

tests/ui/drop/drop-noncopyable-raw-pointer.rs

@@ -1,3 +1,4 @@
+//! regression test for <https://github.com/rust-lang/rust/issues/4735>
 //@ run-pass
 
 use std::mem::transmute;