Allow creating new .NET arrays from Python using Array[T](dim1, dim2,…) syntax

[lostmsu]

What does this implement/fix? Explain your changes.

This handles a few new argument combinations in tp_new of .NET array types:

1. A single integer to create a one-dimensional array of specified size.
2. Multiple integers passed as arguments (e.g. Array[T](3,5,7)) to create a multidimensional array.

It processes all exceptions specified in https://docs.microsoft.com/en-us/dotnet/api/system.array.createinstance?view=net-5.0#System_Array_CreateInstance_System_Type_System_Int64___

Does this close any currently open issues?

fixes #251

Checklist

Check all those that are applicable and complete.

• Make sure to include one or more tests for your change
• If an enhancement PR, please create docs and at best an example
• Add yourself to AUTHORS
• Updated the CHANGELOG

[codecov-io]

Codecov Report

Merging #1291 (1d17421) into master (c81c3c3) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1291   +/-   ##
=======================================
  Coverage   87.97%   87.97%           
=======================================
  Files           1        1           
  Lines         291      291           
=======================================
  Hits          256      256           
  Misses         35       35           

Flag	Coverage Δ
setup_linux	65.29% <ø> (ø)
setup_windows	74.22% <ø> (ø)

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