ggml: move op parameters from tensors to ggml_tensor::op_params

[slaren]

No description provided.

[slaren]

While doing this, I also noticed that there are a bunch of result->src[1] = NULL; in ops that isn't really necessary, as src is already initialized to NULL. I think this made sense for clarity before, but after moving src0 and src1 into an array, they seem out of place.
Should I remove these?

[ggerganov]

Yes lets remove the explicit NULLs

Btw, for PRs you can now add ggml-ci string somewhere in the commit message and this will trigger extra integration tests in the Azure cloud. The CI only monitors branches in this repo though. It's useful for future PRs