[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
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