Remove unnecessary ValueDebugFormat item, hide Vc field (#5567)
### Description
This removes unnecessary items from the IDE's autosuggestion.
I'd also like to get rid of all the `*_inline` suggestions, but RA will
ignore `#[doc(hidden)]` when inside the same crate. I don't think
there's a way to indicate "never, ever suggest this item". We could move
some of these to be private to some generated module, but that module
would probably still show up as a top level suggestion.
### Testing Instructions
Automated tests.
