Please add support for managing the email-ext config file types, GroovyTemplateConfigProvider and JellyTemplateConfigProvider, via job-dsl.

These are used for ${SCRIPT, script="managed:script-name"} and ${JELLY_SCRIPT, html="managed:script-name"}

These would complement the already existing support for the CustomConfigProvider which is used for ${TEMPLATE, file="managed:template-name"}