inductor: meta registration for mkldnn ops (#91299)
Fix https://github.com/pytorch/torchdynamo/issues/198, which supports Meta tensor for conv/linear fused ops to reduce the compilation time.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/91299
Approved by: https://github.com/jgong5, https://github.com/EikanWang, https://github.com/jansel
