Auto merge of #70809 - matthiaskrgr:submodule_upd, r=Mark-Simulacrum

submodules: update clippy from 326b2204 to 7907abea

Changes:
````
Rustup to rust-lang/rust#70634
Update clippy_lints/src/types.rs
Update types.rs
Update types.rs
Improve docs for option_option
useless Rc<Rc<T>>, Rc<Box<T>>, Rc<&T>, Box<&T>
Allow let_underscore
Update option_option ui test
Test for ignoring let_underscore_must_use
Downgrade option_option to pedantic
````

Fixes #70709