Package lambda and upload directly to S3

[thekid]

Create a one-step ZIP creation instead of the following:

#!/bin/sh

NAME=...

xp lambda package src vendor config.ini
aws s3 cp function.zip s3://timms-xp-deployment/lambdas/$NAME.zip

Idea: xp lambda upload s3://timms-xp-deployment/lambdas/$NAME.zip [...]