MAINT: Use bundle_tools_3 and fix various bugs

[larsoner]

A naive attempt at https://github.com/conda/constructor/pull/474#issuecomment-1634249245

• [x] Get CIs green
• [x] Put anything back that macOS needs
• [x] Check installer on Windows
  • [x] Single-user
  • [x] All-user
• [x] Check installer on Linux
• [x] Add developer dependencies
• [x] Wait for https://github.com/conda-forge/blas-feedstock/pull/104 and rerun
• [x] Wait for https://github.com/conda-forge/mne-features-feedstock/pull/4 and rerun
• [ ] Check installer on macOS
  • [x] larsoner (M1)
  • [x] user install
  • [x] system-wide install
  • [ ] hoechenberger
  • [ ] cbrnr

Closes #204 Closes #191 Closes #190 Closes #182 Closes #181 Closes #131

[larsoner]

Okay I added some basic set of dev dependencies (I couldn't even run pytest with the previous version!) and new artifacts are here:

https://github.com/mne-tools/mne-installers/actions/runs/6091167620?pr=195#artifacts

Unless anyone objects I'll merge tomorrow to keep things moving and we can deal with other stuff in follow-up PRs.