[quant][graphmode] Add warning for debug option for add_scalar/mul_scalar (#40383)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40383
debug option is not supported for these cases, so we print a warning if it occurs
Test Plan: Imported from OSS
Differential Revision: D22164071
fbshipit-source-id: 90459530f4efdd6d255df4f015606cb0e9070cd3
