Conda mutex

[erikwijmans]

Motivation and Context

We should use a mutex package instead of track features to support mamba.

If this looks good ill upload the mutex packages and updated feature packages to aihabitat and aihabitat-nightly (the new feature packages are backwards compatible)

Closes #1539

How Has This Been Tested

On MacOS, the following all get the right package

mamba/conda create -n hsim-mutex-test python=3.7 habitat-sim -c conda-forge -c erikwijmans
mamba/conda create -n hsim-mutex-test python=3.7 withbullet habitat-sim -c conda-forge -c erikwijmans
mamba/conda create -n hsim-mutex-test python=3.7 headless habitat-sim -c conda-forge -c erikwijmans
mamba/conda create -n hsim-mutex-test python=3.7 headless withbullet habitat-sim -c conda-forge -c erikwijmans

(I only did osx and those aren't real packages, just dummies to test with, so don't try on not osx or actually try to use them)

Types of changes

Docs change / refactoring / dependency upgrade

[Skylion007]

Yuck, our yaml versioning doesn't match, but oh well.

[erikwijmans]

Do you mean that it doesn't match with the simulator version? I think that's fine. These are feature tracking(/mutex deciding? no idea what to call them now) and don't match up with any version of habitat-sim.

[Skylion007]

Ah, as long as they don't match with any version of HabSim, it's fine.

[Skylion007]

While we are at it. our updated conda-build script complains about a lot of unnecessary requirements. We may want to remove them. It also recommends running conda-verify against our built packages, which we do not currently do.

[erikwijmans]

I don't have the cycles to debug removing packages and conda warns that users don't need python to run our package so it's not a simple as just following what it says. I'm unfamiliar with conda-verify, but I assume it's suggestions too needs manual verification.

[Skylion007]

Just merge it as is then.