[quant][graphmode] Rename graph mode quantization API to `quantize_jit` (#40212)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/40212
Test Plan: Imported from OSS
Reviewed By: z-a-f
Differential Revision: D22144745
fbshipit-source-id: 38a19b5afdddbbce262eea8ddf5b68458e6017b3
