Update SimpleVariantFormatter to handle hybrid descriptions

[John-F-Wagstaff]

Current Limitation
SimpleVariantFormatter has issues with hybrid psudo-vcf type descriptions due to it's origin as a simpler formatting tool, but sometimes it would be useful to be able to submit at least a few more types of non standard description.

Suggested addition
Handling psudo-vcf type descriptions like chr17:50198002C>A as well a 17:50198002C>A through this endpoint.

Alternative solutions
We could otherwise submit to the core VariantValidatior, but this is overkill for our current needs and adds significant, undesirable, overhead to the validation.

[Peter-J-Freeman]

Now completed.

https://rest.variantvalidator.org/LOVD/lovd/GRCh38/chr9%3A133449833T%3EC/all/all/False/True?content-type=application%2Fjson

Should now handle any genomic variant that VV can handle