[AIE2P] Tests to verify llvm.vector.reduce.fadd.* generates vectorized code.

This patch is dependent on Xilinx#548 and Xilinx#557. Previously bf16 and f32 failed to
generate fully vectorized code and used to scalarize, this test makes sures
different types and vector sizes work and are fully vectorized.

This is a supplementary patch for verifying below pipeline:
Part 1: `vector.multi_reduction` to `vector.reduction` to `llvm.vector.reduce.fadd.*`
nod-ai/iree-amd-aie#1336
Part 2: Further lowers to AIE2P instructions.(This patch)

Author: Sameeranjoshi