Require a lot more rock, time and mortar for the stone wall

[NetSysFire]

Summary

Balance "Stone walls (the non-dry variants using mortar) now require more than 3l of rocks to build"

Purpose of change

CC @Maleclypse since they did some work on the dry stone wall.

3l of rocks. For an entire section of wall.

Describe the solution

These values are eyeballed. I am obviously not a real life architect. Especially on the mortar part I am unsure but that is trivially easy to tweak.

• Increase time using to build it: from 180 to 280 minutes
• Increase mortar cost from 1l to 10l.
• Every stage now requires 0.5m³ of rock. Either field stone or large rocks. Plus 50 ordinary rocks for filling gaps (12.5l).

Describe alternatives you've considered

Testing

Applied changes locally.

Additional context