Add "nrcalong"/"nrcblong" to detector_list

[eteq]

I was about to create an issue asking to add nrcalong/nrcblong to the valid detectors... but on a lark I tried nircam.detector = 'nrcalong' and was surprised it worked! The reason I was surprised is that nircam.detector_list() yields:

['NRCA1',
 'NRCA2',
 'NRCA3',
 'NRCA4',
 'NRCA5',
 'NRCB1',
 'NRCB2',
 'NRCB3',
 'NRCB4',
 'NRCB5']

And it took me quite a while to realize 5 = long. Given the JWST data products use the *long naming scheme, I suggest either 1) addint nrcalong/nrcblongto the list, or just change the "real" name fromnrc?5tonrc?long`.