Improve variations in create_report

[gmalinve]

At the moment if variations is not provided as input to the method and there are no available variations in the design, report is empty.

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[Samuelopez-ansys]

LGTM.

We will need to cover more cases in another pull request (like domain = "Time")

[codecov]

Codecov Report

Merging #3924 (bdf00b3) into main (8f38bd0) will increase coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3924      +/-   ##
==========================================
+ Coverage   81.29%   81.30%   +0.01%     
==========================================
  Files         182      182              
  Lines       63037    63042       +5     
==========================================
+ Hits        51247    51258      +11     
+ Misses      11790    11784       -6     

[amichel0205]

Hello All,

I just wanted to point out that the primary sweep is not a variation. Variation for me is when you add any variable and define a sweep for this variable in optimetrics. A variation will be specified with a corresponding primary sweep.
So I can't tell the consequence of considering the primary sweep as a variation but I just wanted to share my thought.

[Samuelopez-ansys]

@amichel0205 Talk with AEDT API development, this is the behavior since AEDT API exists :)