Move crash tests to ui tests

Author: reddevilmidzy

tests/crashes/101036.rs

@@ -14,3 +14,5 @@ struct UwU<
     // here to suppress "unused generic" error if the code stops ICEing
     _x: core::marker::PhantomData<A>,
 }
+
+fn main() {}

tests/crashes/106473.rs

@@ -2,7 +2,7 @@
 
 #![feature(generic_const_exprs)]
 
-use core::marker::PhantomData;
+use std::marker::PhantomData;
 
 pub const DEFAULT_MAX_INPUT_LEN: usize = 256;
 
@@ -32,3 +32,5 @@ where
         }
     }
 }
+
+fn main() {}

tests/crashes/114212-2.rs

@@ -6,3 +6,5 @@ struct Matrix<D = [(); 2 + 2]> {
 }
 
 impl Matrix {}
+
+fn main() {}