Add vendor specific CDI client

[hase1128]

Currently, the Operator only implements Sunfish client as CDI_PROVIDER_TYPE. We will also implement new vendor-specific clients.

[mgazz]

@hase1128 Thank you for looking into this. Feel free to reach out in case you need changes in the how we select the provider type.

[hase1128]

I think there is no problem with the current method (specifying environment variables in the ComposabilityRequest yaml file).