Add possibility to input uid

[JulienPeloton]

I observe race conditions when generating the SSOFT:

File "/tmp/ipykernel_31682/230363110.py", line 26, in extract_ephem
  File "/opt/anaconda/lib/python3.9/site-packages/fink_utils/sso/utils.py", line 269, in get_miriade_data
    eph = query_miriade_epehemcc(
  File "/opt/anaconda/lib/python3.9/site-packages/fink_utils/sso/utils.py", line 199, in query_miriade_epehemcc
    os.remove(date_path)
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/ramdisk/spins/dates_3447621.txt'

I suspect the file has been erased by another process using the same UID. It is better to use https://spark.apache.org/docs/latest/api/python/reference/pyspark.sql/api/pyspark.sql.functions.rand.html to generate ID as arguments.