Multi-head Attention Temporarily Disabled -- ObjectFIFO can't handle conditionals with newer MLIR-AIE

[andrej]

Temporarily disabled until fixed in MLIR-AIE:

MHA_h1_s16384_d64_kv0_npu2.mlir:415:21: error: 'aie.objectfifo.acquire' op cannot statically analyze cyclostatic acquire pattern: acquire/release is inside a conditional