Remove mutating keyword from write(_:)

Author: aryan-25

Sources/AWSLambdaRuntimeCore/LambdaRuntimeClientProtocol.swift

@@ -15,7 +15,7 @@
 import NIOCore
 
 package protocol LambdaRuntimeClientResponseStreamWriter: LambdaResponseStreamWriter {
-    mutating func write(_ buffer: ByteBuffer) async throws
+    func write(_ buffer: ByteBuffer) async throws
     func finish() async throws
     func writeAndFinish(_ buffer: ByteBuffer) async throws
     func reportError(_ error: any Error) async throws

Sources/AWSLambdaRuntimeCore/NewLambdaHandlers.swift

@@ -48,7 +48,7 @@ package protocol StreamingLambdaHandler {
 package protocol LambdaResponseStreamWriter {
     /// Write a response part into the stream. Bytes written are streamed continually.
     /// - Parameter buffer: The buffer to write.
-    mutating func write(_ buffer: ByteBuffer) async throws
+    func write(_ buffer: ByteBuffer) async throws
 
     /// End the response stream and the underlying HTTP response.
     func finish() async throws

Tests/AWSLambdaRuntimeCoreTests/LambdaMockClient.swift

@@ -24,7 +24,7 @@ struct LambdaMockWriter: LambdaRuntimeClientResponseStreamWriter {
         self.underlying = underlying
     }
 
-    mutating func write(_ buffer: ByteBuffer) async throws {
+    func write(_ buffer: ByteBuffer) async throws {
         try await self.underlying.write(buffer)
     }