Rust: move nested ql test out

rust/ql/test/extractor-tests/canonical_path_disabled/anonymous.rs

@@ -1,5 +1,5 @@
-// would prefer to write `include!("../anonymous.rs");`
-// but it seems `include!` does not work in rust-analyzer/our extractor
+// would prefer to write `include!("../canonical_paths/anonymous.rs");`
+// but `include!` does not work with out-of-dir files
 
 use super::regular::Trait;
 

rust/ql/test/extractor-tests/canonical_path_disabled/regular.rs

@@ -1,5 +1,5 @@
-// would prefer to write `include!("../regular.rs");`
-// but it seems `include!` does not work in rust-analyzer/our extractor
+// would prefer to write `include!("../canonical_path/regular.rs");
+// but `include!` does not work with out-of-dir files
 
 #[derive(Eq, PartialEq)]
 pub struct Struct;