Add NaturalLanguage Variable Type and deprecate Text

[gsheni]

Pull Request Description

• Fixes Rename Text variable type to NaturalLanguage #1112
• Rename the Text variable type to be more descriptive with the name NaturalLanguage
• Raise a FutureWarning instead of DepreciationWarning

Changed in version [python] 3.2: DeprecationWarning is now ignored by default in addition to PendingDeprecationWarning.

• Renamed all instances of Text to NaturalLanguage in primitives, and documentation
• Added test to find_variable_types and list_variable_types to make sure Text does not show up.
• Updated Features Schema 5.0.0 -> 6.0.0
• Updated Entityset Schema 4.0.0 -> 5.0.0

[codecov]

Codecov Report

Merging #1159 into main will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1159   +/-   ##
=======================================
  Coverage   98.60%   98.60%           
=======================================
  Files         129      130    +1     
  Lines       13890    13927   +37     
=======================================
+ Hits        13696    13733   +37     
  Misses        194      194           

Impacted Files	Coverage Δ
featuretools/demo/retail.py	94.73% <ø> (ø)
featuretools/tests/entityset_tests/test_dask_es.py	100.00% <ø> (ø)
featuretools/tests/entityset_tests/test_es.py	100.00% <ø> (ø)
...aturetools/tests/entityset_tests/test_koalas_es.py	100.00% <ø> (ø)
featuretools/tests/testing_utils/mock_ds.py	100.00% <ø> (ø)
featuretools/entityset/entity.py	96.35% <100.00%> (+0.01%)	⬆️
featuretools/entityset/serialize.py	100.00% <100.00%> (ø)
featuretools/feature_base/features_serializer.py	100.00% <100.00%> (ø)
...retools/primitives/standard/transform_primitive.py	100.00% <100.00%> (ø)
featuretools/tests/entityset_tests/test_entity.py	100.00% <100.00%> (ø)
... and 10 more

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[rwedge]

Looks good!

[rwedge]

Not sure why the codecov checks aren't showing up but I checked the codecov site and coverage looks good