Validate since and with-baseline mutually exclusive

[danihengeveld]

Is your feature request related to a problem? Please describe.
At the moment, it is possible to use the --since and --with-baseline flags at the same time, but we want this to be mutually exclusive.

Describe the solution you'd like
We want to add the following validation:

• If --with-baseline is passed, --since may not be passed.

For both of these scenarios, we want to throw an InputException.

Describe alternatives you've considered
In the near future, we want to make these options into explicit commands. See: #2124, #2554. This way, the user needs to explicitly choose which one to use. But this requires some work to be done to the cli/command setup first.