Remove ErrorHandler workaround added in 1.14

With [1] we had to introduce a workaround that is going to be likely removed in next 3.18 and 3.19 Camel version [2]. This is a follow up issue to remove such a workaround once the API will be updated in Camel.

[1] https://github.com/apache/camel-k-runtime/commit/0d5a3e9d28485a893a9825aefb4d1c61c6c7b0c9
[2] https://github.com/apache/camel/commit/adc87b142dcb5b81347cce4a1a262c65cd2c98bd