In related to
CAMEL-15270 we should add some SPI interface for pluggable sources for creating routes from route templates. The sources would then fetch the parameters. This allows end users for example to have a SQL source that can read parameters from a database table. And also plain file source for files, a k8s config map etc.
Then we can have a MainProperties source that does the camel.route-template parameters from properties as we have in