Change: [Win32] unify the crashlog handler with the other OSes

[TrueBrain]

Motivation / Problem

Windows didn't use the base crashlog handler for most part, and does everything itself. This is a bit annoying when we want to change things, as you have to remember to change it in two places. So while working on #11232 this was a real pita.

So, in this PR I set out to fix that discrepancy, and make sure Windows is much more like the rest.

Description

The main difference is that Windows delayed creating a crash.sav. This is the only OS that does so, both MacOS and Linux create a crash.sav immediately. Otherwise, other PRs before this PR already made sure Windows is much more like the rest.

While at it, make the crash text a bit more readable, and sync this with MacOS. It just read a bit awkward.

Limitations

There is an argument to be made that a crash.sav should not be made when a crashlog is generated, but only on demand. As it is not unlikely creating a savegame causes other problems. After all, we are in a broken state. But we also noticed this often leads to users not having a crash.sav to add to a ticket, as they simply didn't read the dialog, or didn't understand what it was saying.

In the long run, I rather focus on something JGRPP did, and detect if we crash during the crash handler, and handle that case more proper. That will be done in a follow-up PR, for all OSes (and not only for Windows).

Checklist for review

Some things are not automated, and forgotten often. This list is a reminder for the reviewers.

• The bug fix is important enough to be backported? (label: 'backport requested')
• This PR touches english.txt or translations? Check the guidelines
• This PR affects the save game format? (label 'savegame upgrade')
• This PR affects the GS/AI API? (label 'needs review: Script API')
  • ai_changelog.hpp, game_changelog.hpp need updating.
  • The compatibility wrappers (compat_*.nut) need updating.
• This PR affects the NewGRF API? (label 'needs review: NewGRF')
  • newgrf_debug_data.h may need updating.
  • PR must be added to API tracker