Modularize out most submodules #435

Job	Run time
start-workflow	3s
cancel-prior-workflows	3s
filter-jobs-on-changes	6s
setup-persistent-repo	18m 12s
check-conda-lock-modified	0s
run-metasims-xilinx_alveo_u250	4s
cleanup-local-fpga-repo	9s
build-default-bitstreams	-1s
run-basic-linux-poweroffs-xilinx_alveo_u250	-1s
	18m 35s

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