Enhancement/721 warnings

[mtar]

Description

Reduces the number of expected warnings on unit tests for all process numbers.

Issue/s resolved: #721

Changes proposed:

• assertWarns on tests with expected warnings happening process numbers.
• use updated numpy type names

Type of change

Bug-fix

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

[codecov]

Codecov Report

Merging #725 (f298dda) into master (13627f3) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #725   +/-   ##
=======================================
  Coverage   95.82%   95.82%           
=======================================
  Files          63       63           
  Lines        8069     8069           
=======================================
  Hits         7732     7732           
  Misses        337      337           

Flag	Coverage Δ
gpu	94.93% <100.00%> (ø)
unit	94.19% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
heat/core/types.py	96.35% <ø> (ø)
heat/core/statistics.py	98.00% <100.00%> (ø)

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