added balance to printing._torch_data for printing of unbalanced arrays

[coquelin77]

Description

added balance to printing to allow for unbalanced arrays to be printed.

Issue/s resolved: #617

Changes proposed:

• balance added to print

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Due Diligence

• All split configurations tested
• Multiple dtypes tested in relevant functions
• Documentation updated (if needed)
• Updated changelog.md under the title "Pending Additions"

Does this change modify the behaviour of other functions? If so, which?

no

[coquelin77]

shall this throw a warning as well when balancing during the print?

[codecov]

Codecov Report

Merging #618 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #618   +/-   ##
=======================================
  Coverage   97.46%   97.46%           
=======================================
  Files          77       77           
  Lines       15461    15470    +9     
=======================================
+ Hits        15069    15078    +9     
  Misses        392      392           

Impacted Files	Coverage Δ
heat/core/printing.py	100.00% <100.00%> (ø)
heat/core/tests/test_printing.py	100.00% <100.00%> (ø)

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