add submodule init in Makefile

1 job for master in 31 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #24339
docker
test

00:00:31

 
Name Stage Failure
failed
test Test
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TOTAL 479 138 71%

=========================== short test summary info ============================
FAILED variant_annotator/tests/test_main.py::test_main - FileNotFoundError: [...
=================== 1 failed, 17 passed, 3 warnings in 2.75s ===================
make: *** [Makefile:25: test] Error 1
Cleaning up file based variables
ERROR: Job failed: exit code 1