Move Capability Flags from common to co-simulation

[KarlWernersson]

As intermediate update and output derivative are no longer used in scheduled execution, the capability flags:

• maxOutputDerivativeOrder
• providesIntermediateUpdate
• recommendedIntermediateInputSmoothness
  should be moved from section 2.4.2. Definition of Capability Flags
  to section 4.4. Description Schema

Is providesEvaluateDiscreteStates used in scheduled execution?
Otherwise it needs a comment about not being used there.

[andreas-junghanns]

providesEvaluateDiscreteStates is only for Event Mode.

[andreas-junghanns]

@pmai : I removed the three capability flags that @KarlWernersson mentioned from the .xsd in PR #1585. It looks odd the way <xs:complexType name="fmi3ScheduledExecution"> "inherits" from fmi3InterfaceType - maybe an XSD expert can do that more elegantly?