Remove clippy clone-double-ref lint noise (#1860)

The lint `clippy::clone_double_ref` was renamed to
`suspicious_double_ref_op` in [this
commit](https://github.com/rust-lang/rust/commit/5c99175a9efcaa3d65712c119f361add22e3a859)
(thanks @liamaharon) and now generates a lot of noise in the terminal
when run both in CI and locally with 1.73.

This renames the lint in line with this, but does not change
functionality.

May cause issues for people running earlier versions locally - @altaua
requesting review to get your opinion on this.