Fix problems with C++ FIFO sizing and naming issues

RTL FMPadding and dynamic padding support

RTL ConvInpGen: Dynamic FM dimensions

- do not set in/outFIFODepths attrs to 0 after setting
- do not set in/outFIFODepths attrs to max() in InsertFIFO
- special handling of first/last FIFO depths for characterization

cnv has unrelated bug for now

Add Kv260 board 

[set_fifo_depths] Adding a new transformation to split fifos larger than the max allowed depth

[Hotfix] Update setup-python in pre-commit gha

[Hotfix] Add missing Jenkins marker in fifosizing test

[CustomOp] Fix setting of NumReps in Thresholding and N in Eltwise node

[Hotfix] Update minimize accumulator width for bipolar case