Update exception type

Author: dagnir

core/http-auth-aws/src/main/java/software/amazon/awssdk/http/auth/aws/crt/internal/signer/AwsChunkedV4aPayloadSigner.java

@@ -186,7 +186,7 @@ public CompletableFuture<Pair<SdkHttpRequest.Builder, Optional<Publisher<ByteBuf
                                                 .map(Long::parseLong)
                                                 // should not happen, this header is added by
                                                 // moveContentLength
-                                                .orElseThrow(() -> new RuntimeException(
+                                                .orElseThrow(() -> new IllegalArgumentException(
                                                     X_AMZ_DECODED_CONTENT_LENGTH + " header not present"));
 
                               long encodedContentLength = calculateEncodedContentLength(decodedContentLength, checksum);

core/http-auth-aws/src/main/java/software/amazon/awssdk/http/auth/aws/internal/signer/AwsChunkedV4PayloadSigner.java

@@ -121,7 +121,7 @@ private void signCommon(ChunkedEncodedPayload payload, V4RequestSigningResult re
                                             .orElseThrow(() -> {
                                                 String msg = String.format("Expected header '%s' to be present",
                                                                            X_AMZ_DECODED_CONTENT_LENGTH);
-                                                return new RuntimeException(msg);
+                                                return new IllegalArgumentException(msg);
                                             }));
 
         String checksum = request.firstMatchingHeader(X_AMZ_CONTENT_SHA256).orElseThrow(