Resolve "datasetparameters compare number"

Closes #618 (closed)

For datasets parameters:

• if the operator is < or > or <= or >=, we compare the numeric values instead of the string values
• This is for now disable for investigation parameters, since, for now, we only update the numeric values for dataset parameters in the ingesters. Let's see if it works as expected, and then we can generalize to all parameters (sample, investigation, etc.).