asarray() implementation

[mtar]

Description

Issue/s resolved: #691
ht.asarray() function added. It is a shortcut for array() with copy set to False.
Some lines in array() are added such that the input array will be directly returned if there is no change. Also, the underlying data of numpy arrays / torch tensors will be reused if copy is False.

Changes proposed:

• asarray()
• Modification of array() functionality when copy is false

Type of change

• New feature

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?

array()

[codecov]

Codecov Report

Merging #707 (a476789) into master (ad145c8) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #707   +/-   ##
=======================================
  Coverage   97.41%   97.41%           
=======================================
  Files          87       87           
  Lines       18333    18360   +27     
=======================================
+ Hits        17859    17886   +27     
  Misses        474      474           

Impacted Files	Coverage Δ
heat/core/factories.py	99.13% <100.00%> (+0.02%)	⬆️
heat/core/tests/test_factories.py	100.00% <100.00%> (ø)

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