[runtime]: AsRef<C> for Cell<C> violates AsRef contract

[SuperFluffy]

The AsRef<C> for Cell<C> and AsMut<C> for Cell<C> impls violate the AsRef contract that these must not fail, see: https://doc.rust-lang.org/std/convert/trait.AsRef.html#relation-to-borrow

In the impls they panic if the cell has the wrong variant:

monorepo/runtime/src/utils/cell.rs

Lines 76 to 92 in 27333b9

	impl<C> AsRef<C> for Cell<C> {
	fn as_ref(&self) -> &C {
	match self {
	Self::Present(context) => context,
	Self::Missing => panic!("{}", MISSING_CONTEXT),
	}
	}
	}
	impl<C> AsMut<C> for Cell<C> {
	fn as_mut(&mut self) -> &mut C {
	match self {
	Self::Present(context) => context,
	Self::Missing => panic!("{}", MISSING_CONTEXT),
	}
	}
	}