Rollup merge of rust-lang#82793 - JohnTitor:move-ui-tests, r=petrochenkov

Move some tests to more suitable subdirs

## The results from classifui

(The full results can be found here: https://gist.github.com/JohnTitor/c9e00840990b5e4a8fc562ec3571e427)

- [lint-expr-stmt-attrs-for-early-lints.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/lint-expr-stmt-attrs-for-early-lints.rs) <sup>unknown</sup>: lint (1.566), feature-gates (-0.632), numbers-arithmetic (-0.955)
- [try-block.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/try-block.rs) <sup>unknown</sup>: binding (1.385), try-block (-0.097), lint (-0.932)
- [backtrace-debuginfo.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/backtrace-debuginfo.rs) <sup>unknown</sup>: macros (1.365), cfg (-0.279), drop (-0.291)
- [issues/issue-3521.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-3521.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/3521)</sup>: consts (1.298), enum (-0.872), in-band-lifetimes (-0.978)
- [impl-bounds-checking.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/impl-bounds-checking.rs) <sup>unknown</sup>: traits (1.243), for (-0.999), shadowed (-0.999)
- [issues/issue-17718.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-17718.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/17718)</sup>: binding (1.236), consts (0.315), extern (-0.779)
- [issue-6157.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issue-6157.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/6157)</sup>: regions (1.213), unboxed-closures (-0.285), traits (-0.510)
- [issues/issue-44373.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-44373.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/44373)</sup>: consts (1.187), nll (0.427), borrowck (-0.704)
- [nullable-pointer-ffi-compat.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/nullable-pointer-ffi-compat.rs) <sup>unknown</sup>: regions (1.184), consts (0.650), traits (-0.571)
- [issues/issue-52992.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-52992.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/52992)</sup>: nll (1.132), associated-types (-0.628), parser (-0.893)
- [issues/issue-2330.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-2330.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/2330)</sup>: traits (1.116), directory_ownership (-0.691), compare-method (-0.981)
- [issue-74047.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issue-74047.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/74047)</sup>: async-await (1.109), impl-trait (-0.629), resolve (-0.781)
- [issues/issue-33140.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-33140.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/33140)</sup>: traits (1.063), coherence (-0.832), codemap_tests (-0.944)
- [issues/issue-28576.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-28576.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/28576)</sup>: traits (1.062), associated-types (-0.333), impl-trait (-0.697)
- [issues/issue-7222.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-7222.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/7222)</sup>: binding (1.062), consts (-0.226), numbers-arithmetic (-0.294)
- [tup.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/tup.rs) <sup>unknown</sup>: structs-enums (1.061), threads-sendsync (-0.550), moves (-0.790)
- [issues/issue-15261.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-15261.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/15261)</sup>: consts (1.052), where-clauses (-0.833), macros (-0.862)
- [issues/issue-76179.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-76179.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/76179)</sup>: associated-types (1.048), process (-0.887), rfc-2457 (-0.984)
- [issues/issue-42344.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-42344.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/42344)</sup>: borrowck (1.043), macros (-0.481), specialization (-0.966)
- [issues/issue-18661.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-18661.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/18661)</sup>: unboxed-closures (1.038), mir (-0.648), higher-rank-trait-bounds (-0.688)
- [issues/issue-2633.rs](https://github.com/rust-lang/rust/blob/master/src/test/ui/issues/issue-2633.rs) <sup>[issue](https://github.com/rust-lang/rust/issues/2633)</sup>: structs-enums (1.020), functions-closures (-0.722), lint (-0.967)

Some notes:
- If there are related tests (e.g. it's for the same issue), they are moved along with it.
- Moved try-block.rs to the `try-block` dir.
- Moved tup.rs to the `tuple` dir.
- Moved some tests that classified as consts to the `statics` dir, as it seems they have statics actually.
- Skipped backtrace-debuginfo.rs because I think classifui overrates their helper macros.

cc rust-lang#73494
r? `@petrochenkov`

Author: JohnTitor

src/test/ui/nullable-pointer-ffi-compat.rs src/test/ui/abi/nullable-pointer-ffi-compat.rs

@@ -8,7 +8,7 @@ use std::path::Path;
 const ENTRY_LIMIT: usize = 1000;
 // FIXME: The following limits should be reduced eventually.
 const ROOT_ENTRY_LIMIT: usize = 1418;
-const ISSUES_ENTRY_LIMIT: usize = 2582;
+const ISSUES_ENTRY_LIMIT: usize = 2565;
 
 fn check_entries(path: &Path, bad: &mut bool) {
     let dirs = walkdir::WalkDir::new(&path.join("test/ui"))