Parallelize Rust function apply_givens_rotation_in_place

[kevinsung]

This loop here: https://github.com/qiskit-community/ffsim/blob/1e555245473a7ba7e94b8324847417a0e4081bf3/src/gates/orbital_rotation.rs#L45

A straightforward attempt doesn't pass the compiler due to the use of unsafe BLAS functions.