Add overload to Array::create that explicitly accepts a context.

[teo-tsirpanis]

SC-42521

The Array::create function uses the context that was used when creating its ArraySchema. This is unintuitive and inflexible, and this PR fixes it by adding an overload that explicitly accepts a context.

Per discussions the existing overload is not deprecated, but users are recommended to explicitly pass a context when creating an array whenever possible.

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TYPE: CPP_API
DESC: Add overload to the Array::create function that explicitly accepts a context.

[kounelisagis]

Shouldn't we have a test for the new overload?

[teo-tsirpanis]

Updated all C++ examples and usages in unit-cppapi-array.cc. I think this would provide adequate test coverage for both the old and new API.

[kounelisagis]

Updated all C++ examples and usages in unit-cppapi-array.cc. I think this would provide adequate test coverage for both the old and new API.

Yes, I agree. We need to test both.

[kounelisagis]

LGTM, thanks!