contracts: Expose environment types for offchain tooling (#14750)

* Expose environment types for offchain tooling

* Use EnvironmentType wrapper

* Add type impl to test config

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Co-authored-by: parity-processbot <>

substrate/frame/contracts/src/tests.rs

@@ -481,6 +481,7 @@ impl Config for Test {
 	type MaxDelegateDependencies = MaxDelegateDependencies;
 	#[cfg(feature = "unsafe-debug")]
 	type Debug = unsafe_debug::TestDebugger;
+	type Environment = ();
 }
 
 pub const ALICE: AccountId32 = AccountId32::new([1u8; 32]);