Remove BooleanNullable Logical Type and have 1 Boolean Logical Type

[gsheni]

• We originally had BooleanNullable and Boolean because EvalML relies on estimator/classifiers that do not support the pandas boolean dtype (which is used in BooleanNullable)
• However, a better long term solution is for Woodwork to have 1 Boolean type that supports nullable values
• For this issue:

1. Remove/Deprecate BooleanNullable
2. Change the Boolean physical type from int64 to Int64
3. Update inference logic to account for this change
4. Verify that Featuretools and EvalML can properly handle this change