Simplify solve implementations across optimizers.

[adekusar-drl]

What is the expected enhancement?

This snippet can be found in many optimizers:

message = self.get_compatibility_msg(problem)
if len(message) > 0:
    raise QiskitOptimizationError(f"Incompatible problem: {message}")

So, it should be pulled up to the base class. This issue is related to #78.