diffsol build hangs on beta and nightly channels

[martinjrobins]

Some other issues that might be relevant:

• Cargo check runs forever and memory usage grows unboundedly rust-lang/rust#116914
• rustdoc: synthetic blanket impls: hang / very long compiletimes with complex mutually recursive structs involving many projections rust-lang/rust#114891
• Passing a lifetime GAT to a closure can cause the compiler to run indefinitely rust-lang/rust#108826

[martinjrobins]

as with the issues above, turning on debug messages:

RUSTC_LOG=TRACE cargo +beta build

eventually hangs with a stream of rustc_trait_selection::traits::project::normalize_with_depth_to calls with an ever increasing depth.

[martinjrobins]

workaround for this is to remove the following bounds from Vector (done in #25)

    + for<'a> VectorOpsByValue<Self::View<'a>>
    + for<'a, 'b> VectorOpsByValue<&'b Self::View<'a>>

[martinjrobins]

I think rust-lang/rust#123471 is in beta now (?) so this can be reverted. We don't currently need these bounds though so I think this can just be closed