ActsGeoUtils: Compile test with optimization, even in a debug build.

Compile test_AlignStoreAccess with optimization, even in a debug build. This test spends much time doing Eigen matrix multiplication, which is very much slower when compiled without optimization. This reduces the time required to run the test in the debug build from 300-400s to 3-4s.

This fixes timeouts that have been observed in the debug build.