Remove close-to-identity ops

Upgrade Brevitas to get bias export fixes

Conv->FC transition w/ spatial dim != (1,1)

all heavier builds moving to finn-examples

Merge branch 'feature/nhwc_flatten' of https://github.com/fpjentzsch/finn into fpjentzsch-feature/nhwc_flatten

Meta-PR for 1D-as-non-square ops and finn-base updates

Merge branch 'feature/1d_convolution_support' of https://github.com/mmrahorovic/finn into feature/1d_convs_and_finn_base_update

Merge branch 'feature/convolutioninputgenerator_nonsquare' of https://github.com/mmrahorovic/finn into feature/1d_convs_and_finn_base_update

Merge branch 'feature/convolutioninputgenerator1d' of https://github.com/mmrahorovic/finn into feature/1d_convs_and_finn_base_update

Merge branch 'feature/vector_vector_activate_batch' of https://github.com/mmrahorovic/finn into feature/1d_convs_and_finn_base_update

Merge branch 'feature/fmpadding_batch' of https://github.com/mmrahorovic/finn into feature/1d_convs_and_finn_base_update

Merge branch 'feature/inferpool_batch' of https://github.com/mmrahorovic/finn into feature/1d_convs_and_finn_base_update

Merge branch 'feature/call_hls' of https://github.com/mmrahorovic/finn into mmrahorovic-feature/call_hls

Update PyTorch and Brevitas