CalculationDriverProbe.Opts (Test-Connect) omitted AllowTrailingCommas and
ReadCommentHandling that CalculationDriverFactoryExtensions.JsonOptions
(spawn) and CalculationDriver.ReinitJsonOptions (in-place ApplyDelta) both
set, so a config blob the real deploy path tolerates could fail Test-Connect
as "invalid JSON" even though deploying it would succeed. Aligned the three
option sets. Also adds CalculationDriverProbeTests.cs, which previously did
not exist at all for this driver type's Test-Connect surface.
Part of code-reviews/Driver.Calculation/findings.md (-003, -004).
Joseph Doherty