add option to install ATL components

[h-vetinari]

Fixes #2062

This breaks on only a handful of feedstocks, but where it does happen it's very annoying to fix for every rerender (and non-obvious for those who don't know). Initially my hope was that MSFT would solve actions/runner-images#9873, but after many months, it's time to admit that that won't happen.

[beckermr]

LGTM! I assume you have tested in feedstock? Assuming it works there, let's merge!

[jakirkham]

Will we want this on GHA too?

[h-vetinari]

LGTM! I assume you have tested in feedstock? Assuming it works there, let's merge!

Have tested this successfully on llvmdev (an affected feedstock). :)

Will we want this on GHA too?

I don't think this is relevant unless/until we start building such big packages on GHA. Also, the setting is currently under AzureRunnerSettings, so that also wouldn't make much sense for GHA. Let's add it when it becomes a concern.

[h-vetinari]

Hm, I had tested the rerender, but not in CI yet. The current version of this PR ends up producing

jobs:
- job: win
  install_atl: true
  pool:
    vmImage: windows-2022

which azure stumbles over with:

/.azure-pipelines/azure-pipelines-win.yml (Line: 7, Col: 3): Unexpected value 'install_atl'

[h-vetinari]

OK, as of the last commit, this is fixed now (i.e. CI for conda-forge/llvmdev-feedstock@54733d3 is running fine).