Revert "[Inductor] Disallow OpOverloadPacket in ir.FallbackKernel (#110567)"
This reverts commit 37a02659921490d85b2b0712ad52b924e0c431cd.
Reverted https://github.com/pytorch/pytorch/pull/110567 on behalf of https://github.com/kit1980 due to breaking internal builds, see D50091340 ([comment](https://github.com/pytorch/pytorch/pull/110567#issuecomment-1754308982))
