Stabilize seal_debug_message (#9550)

* Stableize `seal_debug_message`

* Update changelog

* Enable more tests

* Cargo fmt

substrate/frame/contracts/src/wasm/runtime.rs

@@ -69,7 +69,6 @@ pub enum ReturnCode {
 	NotCallable = 8,
 	/// The call to `seal_debug_message` had no effect because debug message
 	/// recording was disabled.
-	#[cfg(feature = "unstable-interface")]
 	LoggingDisabled = 9,
 	/// The call dispatched by `seal_call_runtime` was executed but returned an error.
 	#[cfg(feature = "unstable-interface")]
@@ -175,7 +174,6 @@ pub enum RuntimeCosts {
 	/// Weight of calling `seal_deposit_event` with the given number of topics and event size.
 	DepositEvent { num_topic: u32, len: u32 },
 	/// Weight of calling `seal_debug_message`.
-	#[cfg(feature = "unstable-interface")]
 	DebugMessage,
 	/// Weight of calling `seal_set_rent_allowance`.
 	SetRentAllowance,
@@ -250,7 +248,6 @@ impl RuntimeCosts {
 				.deposit_event
 				.saturating_add(s.deposit_event_per_topic.saturating_mul(num_topic.into()))
 				.saturating_add(s.deposit_event_per_byte.saturating_mul(len.into())),
-			#[cfg(feature = "unstable-interface")]
 			DebugMessage => s.debug_message,
 			SetRentAllowance => s.set_rent_allowance,
 			SetStorage(len) =>
@@ -1748,7 +1745,7 @@ define_env!(Env, <E: Ext>,
 	// not being executed as an RPC. For example, they could allow users to disable logging
 	// through compile time flags (cargo features) for on-chain deployment. Additionally, the
 	// return value of this function can be cached in order to prevent further calls at runtime.
-	[__unstable__] seal_debug_message(ctx, str_ptr: u32, str_len: u32) -> ReturnCode => {
+	[seal0] seal_debug_message(ctx, str_ptr: u32, str_len: u32) -> ReturnCode => {
 		ctx.charge_gas(RuntimeCosts::DebugMessage)?;
 		if ctx.ext.append_debug_buffer("") {
 			let data = ctx.read_sandbox_memory(str_ptr, str_len)?;