[NIRPS] NIGHT_SKY in get_trg_type (pseudo const)

[njcuk9999]

Query:

SELECT ABSPATH, KW_OBJNAME, KW_OBJECTNAME, KW_DPRTYPE, KW_TARGET_TYPE from findex_nirps_he_online_db WHERE KW_OBJECTNAME LIKE "%NIGHT%" AND BLOCK_KIND="red" AND KW_OUTPUT="EXT_E2DS_FF" AND KW_FIBER="A";

These files need TRG_TARGET that we can use to define a file_defintion NIGHT_SKY_SLY

Also EFF,SKY,SKY should not be DARK_DARK_SKY maybe they should be EFF_SKY_SKY