Companion PR for #6569 (#1394)

* Update wasm-builder version to 2.0.0

* Fix all crate compile

* Update cargo lock

* Bump runtime impl_version

polkadot/parachain/test-parachains/halt/src/lib.rs

@@ -23,6 +23,13 @@
 #[cfg(feature = "std")]
 include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));
 
+#[cfg(feature = "std")]
+/// Wasm binary unwrapped. If built with `BUILD_DUMMY_WASM_BINARY`, the function panics.
+pub fn wasm_binary_unwrap() -> &'static [u8] {
+	WASM_BINARY.expect("Development wasm binary is not available. Testing is only \
+						supported with the flag disabled.")
+}
+
 #[cfg(not(feature = "std"))]
 #[panic_handler]
 #[no_mangle]
@@ -46,4 +53,3 @@ pub fn oom(_: core::alloc::Layout) -> ! {
 pub extern fn validate_block(params: *const u8, len: usize) -> usize {
 	loop {}
 }
-