SHACL - Split out bulk validation into separate method

[hmottestad]

We currently have:

• Transactional validation
• SPARQL based bulk validation

For constraints where the SPARQL based bulk validation is not implemented we fall back to using the transactional validation and passing in a target provider to essentially revalidate everything. Some of the transactional validation implementations detect[1] when they are used for bulk validation to provide a more optimized validation.

1: AllTargetsPlanNode