We should use the new locations feature

When I route I should get
| .... | locations |
| .... | a,b,c     |

to verify the turn locations we omit in the guidance scenario.
Especially collapsing turns (collapse.feature, but also part of turn-lanes/turn-angles and other scenarios) should be checked for whether the location we emit actually is reasonable.

I expect many of these actually to be broken (so use caution on simply accepting the current output).

From the broken cases, we should then start improving/refactoring the post-processing for turn collapsing.