Enable UI capabilities based on optionally installed features

[lresende]

Is your feature request related to a problem? Please describe.
Today, Elyra UI assumes all features are installed by default, including all different supported runtimes. When considering a real production deployment scenario, this might not be true, and only one runtime might be available together with some other tweaks on the available components/functionalities.

The UI should be able to morph based on the available capabilities.

Describe the solution you'd like
The available capabilities should be expressed via a single service and/or shared config.
The UI should enable/disable capabilities based on the provided information

• What runtimes are installed
• What runtime-specific capabilities are available (e.g. argo vs tekton)
• What icons should be enabled on the launcher for the runtime specific pipelines
  • The icon should be provided from the runtime itself
• Handle opening pipelines for unsupported runtime

Note: Any checks for specific runtimes (e.g. if runtime == 'kfp') should be removed
Note: Check if the schema service might suffice for providing all required information for ui-morphing
Note: Frontend sister PR / blocked by #2136

[ajbozarth]

FYI This is primarily to support #2136

[juliusvonkohout]

Do you have an ETA for this feature?

[kevin-bates]

#3114 may be all that is necessary for this since the exposed tiles are sensitive to the desired runtimes.