Fix typedef and undef ctors for ConcreteRArray and ConcreteRNumber

[oschulz]

I don't know what I was thinking in #1558, but Julia convention is of course
ArrayType{T}(undef, dims) and ArrayType{T}(undef, dims...), but not ArrayType(undef, T, dims).

Also, the typedef for ConcreteRArray was missing T and N parameters and the typedefs for ConcreteRNumber was missing T,

This PR fixes that (with deprecation for ConcreteRArray(undef, T, dims; kwargs...)) and adds tests.

[wsmoses]

I wouldn't bother deprecating and just deleting the bad one here.

[oschulz]

I wouldn't bother deprecating and just deleting the bad one here.

Ok, it's gone. :-)

[oschulz]

I wouldn't bother deprecating and just deleting the bad one here.

Ok, it's gone. :-)

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 43.44%. Comparing base (b6ffc96) to head (e6025e3).
⚠️ Report is 1422 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ConcreteRArray.jl	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1571       +/-   ##
===========================================
+ Coverage   21.66%   43.44%   +21.77%     
===========================================
  Files          46      124       +78     
  Lines        8048    22021    +13973     
===========================================
+ Hits         1744     9566     +7822     
- Misses       6304    12455     +6151     

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[oschulz]

Are the test failures related to this PR?

[giordano]

No (and one is simply the coverage step failing to start at all)

[oschulz]

No (and one is simply the coverage step failing to start at all)

Thanks. I'm good with this from my side then.