[draft] S3 multiupart API

[L-Applin]

Duplicate of #4224 to try to fix merge form master issues

Adds MultipartConfiguration to the S3AsyncClientBuilder to enables Multipart operation on S3AsyncClient.

The following methods were added to S3AsyncClientBuilder (codegen):

    /**
     * Enables automatic conversion of put and copy method to their equivalent multipart operation.
     */
    default S3AsyncClientBuilder multipartEnabled(Boolean enabled) {
        throw new UnsupportedOperationException();
    }

    /**
     * Configuration for multipart operation of this client.
     */
    default S3AsyncClientBuilder multipartConfiguration(MultipartConfiguration multipartConfiguration) {
        throw new UnsupportedOperationException();
    }

    /**
     * Configuration for multipart operation of this client.
     */
    default S3AsyncClientBuilder multipartConfiguration(Consumer<Builder> multipartConfiguration) {
        Builder builder = MultipartConfiguration.builder();
        multipartConfiguration.accept(builder);
        return multipartConfiguration(builder.build());
    }

The following method has been added to DefaultS3AsyncClientBuilder (codegen):

    @Override
    public S3AsyncClientBuilder multipartEnabled(Boolean enabled) {
        clientContextParams.put(MultipartConfiguration.MULTIPART_ENABLED_KEY, enabled);
        return this;
    }

    @Override
    public S3AsyncClientBuilder multipartConfiguration(MultipartConfiguration multipartConfig) {
        clientContextParams.put(MultipartConfiguration.MULTIPART_CONFIGURATION_KEY, multipartConfig);
        return this;
    }