added dt inference to test case

[Test] Add test for LowerConvsToMatMul applied to conv with  kernel size 1x1, stride == 1 and no padding

[TEST] Add test linear_past_eltwise_add when the graph has multiple joins where to apply the transformation (was failing in this case) plu test moving linear tensor ops, not only scalar ones

[TEST] Add test to verify that CollapseRepeatedOp only operates on linear segments. Add check to previous test to verify that the transformation is doing the required job