LALPulsar: attic LatticeCovering.[ch] and DopplerLatticeConvering.[ch]

- no longer actively developed/used
- copy still-needed code to DopplerFullScan.c
- gridType=7 no longer recognised by CFSv2
- refs #1312
LALPulsar: attic FoldAmplitudes.[ch] and test

- unused
- refs #1312
LALPulsar: attic PulsarCat.[ch], PulsarCatInput.c, and test

- unused
- refs #1312