cred_helper: run black #730

Job	Run time
Generate configs	8s
Lint Bazel files	5s
Local flow - clean setup	7m 5s
//sram:top_mix_grt	3m 1s
tag_array_64x184_generate_abstract	3m 38s
tag_array_64x184_report	2m 14s
lb_32x128_generate_abstract	3m 43s
lb_32x128_test_generate_abstract	2m 16s
L1MetadataArray_generate_abstract	4m 58s
data_2048x8_generate_abstract	2m 18s
regfile_128x65_floorplan	2m 13s
subpackage:L1MetadataArray_generate_abstract	5m 10s
subpackage:tag_array_64x184_generate_abstract	2m 6s
Local flow - preinstalled orfs	7m 16s
	46m 11s

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