Update init calls in add_last_time_indexes to use init_with_parital_schema

[thehomebrewnerd]

Update init calls in add_last_time_indexes to use init_with_parital_schema

Fixes #1463

Note: The current Woodwork init call simply calls init_with_partial_schema and passes along all the specified kwargs, so this change does not alter any of the existing behavior, but just makes it more clear that we are reusing the existing schema information by calling init_with_partial_schema

[tamargrey]

Looks good! Only thing I can think to add might be a test that mocks out the woodwork init and confirms it's not called, but given how minor of a change this is, that's probably overkill.

[codecov]

Codecov Report

Merging #2409 (9ab216c) into main (c6dfef6) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #2409   +/-   ##
=======================================
  Coverage   99.44%   99.44%           
=======================================
  Files         326      326           
  Lines       20208    20208           
=======================================
  Hits        20096    20096           
  Misses        112      112           

Impacted Files	Coverage Δ
featuretools/entityset/entityset.py	99.22% <100.00%> (ø)

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