Deploy pallet-parameters to rococo and fix dynamic_params name expand (#4006)

Changes:
- Add pallet-parameters to Rococo to configure the NIS and preimage
pallet.
- Fix names of expanded dynamic params. Apparently, `to_class_case`
removes suffix `s`, and `Nis` becomes `Ni` 😑. Now using
`to_pascal_case`.

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Alessandro Siniscalchi <asiniscalchi@gmail.com>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
Co-authored-by: command-bot <>

substrate/bin/node/runtime/src/lib.rs

@@ -2198,7 +2198,7 @@ impl EnsureOriginWithArg<RuntimeOrigin, RuntimeParametersKey> for DynamicParamet
 				frame_system::ensure_root(origin.clone()).map_err(|_| origin)?;
 				return Ok(())
 			},
-			RuntimeParametersKey::Contract(_) => {
+			RuntimeParametersKey::Contracts(_) => {
 				frame_system::ensure_root(origin.clone()).map_err(|_| origin)?;
 				return Ok(())
 			},