Add From<NonZero*> impls for wider NonZero types

[newpavlov]

For example in getrandom to convert NonZeroU16 to NonZeroU32 we have to write code like this:

num::NonZeroU32::new(e.get() as u32).unwrap().into()

Instead of using a simple e.into().

This issue has been assigned to @peter-wilkins via this comment.

[Dylan-DPC-zz]

@rustbot claim @peter-wilkins

[rustbot]

Error: Parsing assign command in comment failed: ...tbot claim|error: expected end of command at >| @peter-wi...

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[Dylan-DPC-zz]

@rustbot assign @peter-wilkins

[c3st7n]

Opened a PR for this (#66479), but I just noticed it was supposed to be assigned to @peter-wilkins, aplogies I hadn't noticed this.

[c3st7n]

I must have branched from an old commit or similar, will fix.

Edit: I had branched off some very old code by mistake, fixed this and force pushed.

[newpavlov]

Fixed in #66277.