Rename `DSL` concept to `Integration type`

[lordrip]

Please describe the task that needs to be done

Currently, we're referring to the different integration types (Routes, Kamelets, Pipes) as DSL but unfortunately, this doesn't reflect very well the meaning of it, as DSL is a different concept, for instance, XML DSL, YAML DSL (the one that we're currently using), Java DSL, etc.

The goal for this ticket is to rename the usage of the DSL wording in the UI and also in the UI components (for instance, renaming the DSLSelector related components to IntegrationTypeSelector.

[lordrip]

Pending to check what would be the right terminology from Camel's doc