Fix spin evolution equation for SpinTaylor approximants

Description

This branch introduces new features into the SpinTaylor precession equations:

• it introduces a flag that can switch on spin dependent term in the orbital angular momentum
• it introduces a flag that can switch between orbital-averaged and instantaneous equations

API Changes and Justification

Backwards Compatible Changes

• This change introduces no API changes
• This change adds new API calls

Backwards Incompatible Changes

• This change modifies an existing API
• This change removes an existing API

Review Status

Review ongoing, see https://git.ligo.org/waveforms/reviews/lalsimulation.siminspiralspintaylorpnevolveorbit/-/wikis/home