add SPARQLCheckMethod

[VladimirAlexiev]

For Tegel checking, we need this:

aec3po:SPARQLCheckMethod a owl:Class ;
    rdfs:label "SPARQL Check Method"@en ;
    rdfs:comment "SPARQL check method refers to a validation process that ensures compliance of data with a predefined SPARQL query, stored in aec3po:asText"@en ;
    rdfs:isDefinedBy aec3po:check_method ;
    rdfs:subClassOf aec3po:DeclarativeCheckMethod .

The superclass already describes this possibility:

aec3po:DeclarativeCheckMethod a owl:Class ;
    rdfs:comment """Declarative check, expressed in IDS, SPARQL, BimSPARQL..."""