fx quant: move qconfig utils to utils file (#48907)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48907
Improving readability
Test Plan:
CI
Imported from OSS
Reviewed By: jerryzh168
Differential Revision: D25363078
fbshipit-source-id: 6b0161db14ccf8c3b47edf4fc760ca9a399254b2
