Consider introducing scalars into the TTIR\TTNN

[sdjordjevicTT]

Some ops can produce scalar values, like Matmul vector-vector product: https://github.com/tenstorrent/tt-mlir/pull/745#discussion_r1764954874

Today, we are converting scalar values into 1D tensors with a size of 1. Perhaps we can consider supporting 0 rank tensors(tensor<f32>, not f32). This is a special case that needs to be handled when constructing and passing into the runtime, but it may not be a significant issue.

[nsmithtt]

So I think we should make the distinction here, that we can potentially support 0 rank tensors:

• Could potentially support this tensor<f32>
• But not this, just a scalar, f32

[sdjordjevicTT]

Fully agree, updated initial issue description.