Provide option to exclude time index from correlation measures

[ParthivNaresh]

Fixes: #1699

[codecov[bot]]

Codecov Report

Merging #1698 (5ffbf66) into main (6b76c82) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1698   +/-   ##
=======================================
  Coverage   98.80%   98.80%           
=======================================
  Files          98       98           
  Lines       11855    11873   +18     
=======================================
+ Hits        11713    11731   +18     
  Misses        142      142           

Impacted Files	Coverage Δ
woodwork/statistics_utils/_get_dependence_dict.py	100.00% <100.00%> (ø)
woodwork/statistics_utils/_get_valid_mi_columns.py	100.00% <100.00%> (ø)
woodwork/table_accessor.py	99.57% <100.00%> (ø)
woodwork/tests/accessor/test_statistics.py	100.00% <100.00%> (ø)

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