[NO ISSUE] Adds __eq__ support for non-normalized fractions

[nsbruce]

If a fraction is created with the _normalize parameter set to false, it fill fail equality checks it should not.

For example before this fix: Fraction(4,2,_normalize=False) != 2.

This PR changes the equality check from just checking that the comparison int equals the numerator to checking that numerator/denominator is equal to the int.

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[hauntsaninja]

The _normalize parameter is meant for internal use only, as an optimisation for creating objects when we know the numerator and denominator are already normalised. Fraction does not support unnormalised fractions.

[hauntsaninja]

In fact, looks like it was removed entirely in #101780