Add Windows BCrypt bindings

[ichordev]

Adds Windows BCrypt bindings (core.sys.windows.bcrypt) to help make this Phobos PR more awesome, and to allow people in general to move away from using the deprecated Windows CryptoAPI.
sdkddkver and w32api are updated here also because bcrypt has conditional compilation that relies on more up-to-date versions of those headers.

[dlang-bot]

Thanks for your pull request and interest in making D better, @ichordev! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.
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• My PR is fully covered with tests (you can see the coverage diff by visiting the details link of the codecov check)
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Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + dmd#20740"

[ichordev]

Removed trailing whitespace.

[thewilsonator]

Would be nice to add a changelog entry for this

[ichordev]

Would be nice to add a changelog entry for this

Will do!

[ichordev]

I tried to generate the preview but it didn't work, so hopefully I did it correctly! Thought I'd have to write my name somewhere?

[ichordev]

OK this time I actually staged the whole changelog and not half of it. 🤦‍♀️