refactor: make root workspace bzlmod only #4661

Job	Run time
matrix-prep	3s
test (7, 7.3.1, 1, ubuntu, local, .)	4m 18s
test (7, 7.3.1, 1, ubuntu, local, e2e/copy_action)	15s
test (7, 7.3.1, 1, ubuntu, local, e2e/copy_to_directory)	44s
test (7, 7.3.1, 1, ubuntu, local, e2e/coreutils)	13s
test (7, 7.3.1, 1, ubuntu, local, e2e/external_copy_to_directory)	38s
test (7, 7.3.1, 1, ubuntu, local, e2e/smoke)	38s
test (7, 7.3.1, 1, ubuntu, local, e2e/write_source_files)	14s
test (7, 7.3.1, 0, ubuntu, local, e2e/copy_action)	12s
test (7, 7.3.1, 0, ubuntu, local, e2e/copy_to_directory)	38s
test (7, 7.3.1, 0, ubuntu, local, e2e/coreutils)	13s
test (7, 7.3.1, 0, ubuntu, local, e2e/external_copy_to_directory)	43s
test (7, 7.3.1, 0, ubuntu, local, e2e/smoke)	36s
test (7, 7.3.1, 0, ubuntu, local, e2e/write_source_files)	15s
test (6, 6.5.0, 0, ubuntu, local, e2e/copy_action)	17s
test (6, 6.5.0, 0, ubuntu, local, e2e/copy_to_directory)	36s
test (6, 6.5.0, 0, ubuntu, local, e2e/coreutils)	13s
test (6, 6.5.0, 0, ubuntu, local, e2e/external_copy_to_directory)	36s
test (6, 6.5.0, 0, ubuntu, local, e2e/smoke)	36s
test (6, 6.5.0, 0, ubuntu, local, e2e/write_source_files)	11s
	12m 9s

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