Update survey scripts to account for sf() updates and R 4.5.2

[rtesra]

• Remove spud dependency as package is deprecated
• Fix GE dataset parsing broken by R/sf upgrade
  • After upgrading to R 4.5.2, readRDS() now returns cached GE GPS files as sf
    objects rather than plain data frames. This caused type.convert() to fail on
    the retained sfc geometry column.
  • Fix adds st_drop_geometry() before as.data.frame() to remove the geometry
    column before processing, with the sf object reconstructed from LONGNUM/LATNUM
    as before.