moved tests

updated `tests/ui/README.md`and `src/tools/tidy/src/issues.txt`

src/tools/tidy/src/issues.txt

@@ -1014,7 +1014,6 @@ ui/for-loop-while/issue-1257.rs
 ui/for-loop-while/issue-2216.rs
 ui/for-loop-while/issue-51345.rs
 ui/for-loop-while/issue-69841.rs
-ui/for/issue-20605.rs
 ui/foreign/issue-74120-lowering-of-ffi-block-bodies.rs
 ui/foreign/issue-91370-foreign-fn-block-impl.rs
 ui/foreign/issue-99276-same-type-lifetimes.rs

tests/ui/README.md

@@ -585,12 +585,6 @@ Exercises the `format!` macro.
 
 A broad category of tests on functions.
 
-## `tests/ui/for/`: `for` keyword
-
-Tests on the `for` keyword and some of its associated errors, such as attempting to write the faulty pattern `for _ in 0..1 {} else {}`.
-
-**FIXME**: Should be merged with `ui/for-loop-while`.
-
 ## `tests/ui/force-inlining/`: `#[rustc_force_inline]`
 
 Tests for `#[rustc_force_inline]`, which will force a function to always be labelled as inline by the compiler (it will be inserted at the point of its call instead of being used as a normal function call.) If the compiler is unable to inline the function, an error will be reported. See <https://github.com/rust-lang/rust/pull/134082>.
@@ -1545,10 +1539,6 @@ Tests on `enum` variants.
 
 **FIXME**: Contains a single test described as "Check that rustc accepts various version info flags.", should be rehomed.
 
-## `tests/ui/warnings/`
-
-**FIXME**: Contains a single test on non-explicit paths (`::one()`). Should be rehomed probably to `tests/ui/resolve/`.
-
 ## `tests/ui/wasm/`
 
 These tests target the `wasm32` architecture specifically. They are usually regression tests for WASM-specific bugs which were observed in the past.