Camel 4.9 - Add boot clock to CamelContext to capture boot time

[davsclaus]

Describe the feature here

There is some processing happening before camel context is started and that boot time is now captured in CSB with
apache/camel-spring-boot@32530b8

So maybe in CEQ where xxxCamelContext is created the first time, then the boot clock can be added.
That allows Camel to show the boot time spent during its startup message.