Add metadata to dt equality check

[tamargrey]

• Closes Add metadata as a part of equality check on DataTable #444

[codecov]

Codecov Report

Merging #449 (a1dbff1) into main (82e18a1) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #449   +/-   ##
=======================================
  Coverage   99.21%   99.21%           
=======================================
  Files          33       33           
  Lines        4462     4468    +6     
=======================================
+ Hits         4427     4433    +6     
  Misses         35       35           

Impacted Files	Coverage Δ
woodwork/datatable.py	100.00% <100.00%> (ø)
woodwork/tests/datatable/test_datatable.py	100.00% <100.00%> (ø)

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