Using conda-forge's tzdata on all platforms

[SylvainCorlay]

With this PR

• tzdata becomes a dependency of howardhinnant_date on all platforms.
• we compile howardhinnant_date with USE_SYSTEM_TZ_DB set to ON on all platforms.
• the discover_tz_dir is patched to return the tzdata directory under the conda prefix instead of that of the system.
• the cmake file is patched to allow using this compilation option on windows.

The patches apply to windows largely come from HowardHinnant/date#611 - except that we use dirent to list files and directories on Windows like it is already done on Linux, making the patch smaller.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe:

• This recipe is using a compiler, which now requires adding a build dependence on {{ stdlib("c") }} as well. Note that this rule applies to each output of the recipe using a compiler. For further details, please see META: {{ stdlib("c") }} migration conda-forge.github.io#2102.

[SylvainCorlay]

@jjerphan I have tested that this works in the sparrow tests on both Windows and Linux.

[jjerphan]

🙏

[jjerphan]

Is there a reason for removing this?

[SylvainCorlay]

It does not work when running conda-build from osx-arm platform. Happy to re-add.

[JohanMabille]

This should be added back, but let's do it in a dedicated PR.