FROMGIT: rust: sync: `CondVar` rename "wait_list" to "wait_queue_head"

Fields named "wait_list" usually are of type "struct list_head". To
avoid confusion and because it is of type
"Opaque<bindings::wait_queue_head>" we are renaming "wait_list" to
"wait_queue_head".

Signed-off-by: Charalampos Mitrodimas <charmitro@posteo.net>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20240105012930.1426214-1-charmitro@posteo.net


Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
(cherry picked from commit 6b1b2326
 https://github.com/Rust-for-Linux/linux.git

 rust-next)
Bug: 324206405
Change-Id: I45f742a1e3783fd5326f354ff974c990554fbde5
Signed-off-by: Alice Ryhl <aliceryhl@google.com>