Convert linelist status to bitflag format

The arc lamp linelist used for calibrating the SpS maintained here:

https://github.com/Subaru-PFS/obs_pfs/blob/master/pfs/lineLists/ArCdHgKrNeXe.txt

and for each line a status is provided:

# Status:
#  0   Isolated, good
#  1   Not visible
#  2   Blend; don't use
#  3   Unreliable when processing sim data (PIPE2D-314)
#  4   Commonly has large residuals (PIPE2D-436)
#  5   Commonly has large residuals (NeI, sims blue arm; PIPE2D-391)

Following today's ICS/SpS telecon, this status information is better encoded as sequence of bit flags. Define the bit flags and update the linelist file and software accordingly.

Note that this could be a breaking change. This should be scheduled carefully so as to avoid problems when running the DRP particularly with ongoing activities at Subaru and LAM.