[Request] max countersink depth for ClearanceHole

[petejohanson]

When using countersunk ClearanceHole, I would like to be able to specify a maximum countersink_depth for the head. My use case is a thin-ish part where I would like to only countersink up to a certain point, in order to not leave an area that is too thin in my part. I am okay if the head of the fastener isn't fully countersunk, I just need it sunk enough to create some additional clearance.