[PT2E][Quant] Fix but in quant spec of symmetric static quant (#99398)
Activation quant spec should have qscheme = per_tensor_affine
Weights quant spec should have ch_axis=0 for per_channel_symmetric
Differential Revision: [D45073789](https://our.internmc.facebook.com/intern/diff/D45073789/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99398
Approved by: https://github.com/jerryzh168
