Optimize bulk upgrade a bit

## Purpose

Make bulk upgrade code path faster to possibly help on older devices, especially when hovering a number of upgradeable structures.

## Objectives

Optimized bulk upgrade costs loop within buildableUnits.

## Description

Bulk upgrade optimizations. Start loop at n=1, n=0 is same as known const const. Fetch owned/constructed types once so it isn't done 50 times within costWrapper, from the upgradeCosts loop.

## Assignment

- [x] I'd like to be assigned to this issue and work on it myself

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tryout33