Adding TaylorF2Ecc

[aleynaakyuz]

This PR solves the error

Traceback (most recent call last):
          File "/home/aakyuz/miniconda3/envs/inj_test/bin/pycbc_inspiral", line 235, in <module>
            gwstrain = strain.from_cli(opt, dyn_range_fac=DYN_RANGE_FAC,
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          File "/home/aakyuz/miniconda3/envs/inj_test/lib/python3.12/site-packages/pycbc/strain/strain.py", line 345, in from_cli
            injector.apply(strain, opt.channel_name.split(':')[0],
          File "/home/aakyuz/miniconda3/envs/inj_test/lib/python3.12/site-packages/pycbc/inject/inject.py", line 632, in apply
            signal = self.make_strain_from_inj_object(
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          File "/home/aakyuz/miniconda3/envs/inj_test/lib/python3.12/site-packages/pycbc/inject/inject.py", line 710, in make_strain_from_inj_object
            hp, hc = get_td_waveform(inj, delta_t=delta_t, f_lower=f_l,
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          File "/home/aakyuz/miniconda3/envs/inj_test/lib/python3.12/site-packages/pycbc/waveform/waveform.py", line 601, in get_td_waveform
            raise ValueError("Approximant %s not available" %
        ValueError: Approximant TaylorF2Ecc not available

[ahnitz]

@aleynaakyuz Please rebase from master and mamke sure the tests pass so this can be merged.

[ahnitz]

@aleynaakyuz Please rebase your PR from master, the tests should now all pass if your PR isn't breaking anything.