Single-shot optimization (2)

This fixes a bug where measure_all() was assumed to be the name of a PyQrack method, whereas it is actually m_all(). (Blame: @WrathfulSpatula)

sha1sums:
80cad129b6a17f59ec1eba8197b02b97c687b928 pennylane_qrack-0.6.9-cp312-cp312-manylinux2014_x86_64.whl
11027ff8205fb0fccce74642349b61893510534e pennylane_qrack-0.6.9-cp312-cp312-manylinux_2_35_x86_64.whl
1e1a18b59b95efcae680e0a6cbea25ded6f2aed4 pennylane_qrack-0.6.9-cp312-cp312-manylinux_2_39_x86_64.whl
627c1b879eaadbc7418ff219dc503794074654c9 pennylane_qrack-0.6.9.tar.gz