[Relay] Share Relay op Infer Type functions

[anijain2305]

Currently, all the infer types functions for Relay are present in *.cc file. This prevents us from reusing these functions among dialects like QNN. This issue is to discuss how do we share them.

I added a PR that moves relevant functions to a header file for transform.cc as a possible proposal - #3783

Please advise - @jroesch @tqchen @vinx13 @zhiics @ZihengJiang

[anijain2305]

Ping :)

Many QNN related ops are gated by it. I am able to get good accuracy for all the TFLite hostel models locally. Will be good if we can solve these problems and ungate a bunch of QNN PRs.

[tqchen]

A proper way would be open a thread with RFC tag, so it would get forwarded to the dev@. I think we could move forward with templatization for now.

[anijain2305]

Thank you @tqchen
I will keep that in mind