Fix tests after recent data layout changes

[fpjentzsch]

• Adjusts some streamlining test conditions to recent layout inference changes
• Fixes Extra InferDataLayouts in ConvertQONNXtoFINN breaks QONNX MobileNetV1 #86 by improving layout inference and doing it more often
• Fixes Placement of step_set_fifo_depths breaks node-by-node rtlsim #85 by allowing node-by-node rtlsim on FIFOs for now
• Fixes (RN-50) or disables (Transformer) CI regression test configs that are currently broken
• Re-apply and fix [Lookup] Relax input datatype constraints #31 to RTLBackend, was only pulled into HLSBackend after recent refactoring