[mlir][tosa] Add broadcasting case for tosa.resize degenerate case

When the resize is ?x1x1x?, the tosa.resize operation broadcasts the
input and (when quantized) applies a scaling factor. Updated the resize
operation to not use a tensor.extract operation, instead broadcasting
the only positional value as necessary.

Moved the tosa.resize tests to their own mlir test due to increased
complexity. Also corrected a bug where tosa.resize for bilinear-floating
point was not applying the correct scaling.

Reviewed By: jpienaar

Differential Revision: https://reviews.llvm.org/D136299