[camel k] support for dependencies archive

[lburgazzoli]

see:

• support for dependencies archive apache/camel-k#334
• Let dependencies be defined using file URLs apache/camel-k#1227

[stale]

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[Delawen]

I'm going to close this as "won't fix" by now.

Extensions will not be considered as part of Syndesis 2.x until we find a good way of including them. We want to use Camel-K and drop spring-boot, so adding external dependencies would be out of scope by now.