chore: update Q3D busbar example with Matrix Reduction Operation

[tizianrot]

Description

1 -Added Matrix Reduction Operation as per User's Request
2- Upon Report Creating (line 180), category="ACL" seems not be read, not error given but report in the GUi is empty

Checklist

Please complete the following checklist before submitting your pull request:

• [x ] I have followed the example template and guide lines to add/update an example.
• [x ] I have tested the example locally and verified that it is working with the latest version of AEDT.
• [ x] I have verified that these changes to the best of my knowledge do not introduce any security vulnerabilities.

[gmalinve]

@tizianrot I think that as soon as the post-processing part starts you could add a line explaining how to get available report categories with: q3d.post.available_quantities_categories() because I see that you specify the category in the get_traces_for_plot.

There are also 2 plots to fix by providing in context the reduced matrix name, for example:
q3d.post.create_report(expressions=data_reducedm2_plot_self, context=q3d.matrices[2].name)