Add uncertainty axioms

[LillyG901]

Description of the issue

The terms needed for describing uncertainties in model(#1829) were added in several different pull requests, which didn't allow for us to add all necessary axioms.

Axioms still needed:

1. relation between uncertainty and uncertainty location
   [2) give model system boundary, technical model implementation, conceptual model, input data and output data the location of uncertainty role] -> has been moved to Add model uncertainty location #1990
2. relation between model system boundary and conceptual model
3. relation between model system boundary and system

Ideas of solution

Proposal/Ideas for axioms to be used:

1. uncertainty of a model SubClass Of has uncertainty location some uncertainty location
   [2) ~ SubClass Of has role some location of uncertainty role ]

3)/4) I could imagine using model system boundary SubClass Of part of some ~
It has also been suggested by @stap-m to use is about.
This does make sense, but would require model system boundary to be an information content entity.

Workflow checklist

• I discussed the issue with someone else than me before working on a solution
• I already read the latest version of the workflow for this repository
• The goal of this ontology is clear to me

I am aware that

• every entry in the ontology should have a definition
• classes should arise from concepts rather than from words