Remove `.ok()` calls on `Result`s

[rnbguy]

There are a few Result::ok() calls in the source code - a few of them are redundant, and a few of them are used wrongly.

1. We convert Option to Result and then to Option. This is redundant as we can simply use the first Option.

basecoin-rs/crates/app/src/modules/ibc/router.rs

Lines 64 to 72 in dc3b43a

	fn lookup_module(&self, port_id: &PortId) -> Option<ModuleId> {
	self.port_to_module_map
	.get(port_id)
	.ok_or(RouterError::UnknownPort {
	port_id: port_id.clone(),
	})
	.cloned()
	.ok()
	}

2. We ignore the fact path serialization has failed.

basecoin-rs/crates/app/src/abci/v0_38/tendermint.rs

Lines 75 to 82 in dc3b43a

	let path: Option<Path> = request.path.try_into().ok();
	let modules = self.modules.read_access();
	let height = Height::from(request.height as u64);
	for IdentifiedModule { id, module } in modules.iter() {
	match module.query(&request.data, path.as_ref(), height, request.prove) {

3. We ignore a codec encode/decode that has failed in concrete Codec implementations. For example, with JsonCodec,

basecoin-rs/crates/store/src/utils/codec.rs

Lines 26 to 33 in dc3b43a

	fn encode(d: &Self::Value) -> Option<Self::Encoded> {
	serde_json::to_string(d).ok()
	}
	fn decode(bytes: &[u8]) -> Option<Self::Value> {
	let json_string = String::from_utf8(bytes.to_vec()).ok()?;
	serde_json::from_str(&json_string).ok()
	}

The Codec trait should have an associated type Error which lets us return a Result with the failure type.