Increase gRpc channel message size to int.MaxValue

[pragnagopa]

Related issue Azure/azure-functions-host#5650

Channel Message Size is set here:

azure-functions-powershell-worker/src/Messaging/MessagingStream.cs

Lines 22 to 26 in 8cab08b

	var channelOptions = new []
	{
	new ChannelOption(ChannelOptions.MaxReceiveMessageLength, maxMessageLength),
	new ChannelOption(ChannelOptions.MaxSendMessageLength, maxMessageLength)
	};

Need to set these values to int.MaxValue and ignore host settings.

[pragnagopa]

@AnatoliB - can you help with this?

[AnatoliB]

Please see this comment: Azure/azure-functions-host#5650 (comment)