gasleft extern implemented for WASM runtime (kip-6) (#9357)

* Wasm gasleft extern added

* wasm_gasleft_activation_transition -> kip4_transition

* use kip-6 switch

* gasleft_panic -> gasleft_fail rename

* call_msg_gasleft test added and gas_left agustments because this https://github.com/paritytech/wasm-tests/pull/52

* change .. to _

* fix comment for the have_gasleft param

* update tests (0edbf860ff)

json/src/spec/params.rs

@@ -152,6 +152,9 @@ pub struct Params {
 	/// KIP4 activiation block height.
 	#[serde(rename="kip4Transition")]
 	pub kip4_transition: Option<Uint>,
+	/// KIP6 activiation block height.
+	#[serde(rename="kip6Transition")]
+	pub kip6_transition: Option<Uint>,
 }
 
 #[cfg(test)]