fix: crash with R devel due to missing function in R API for C code

From https://forgemia.inra.fr/umr-g-eau/fairify/-/jobs/1037608

Error: package or namespace load failed for ‘this.path’ in dyn.load(file, DLLpath = DLLpath, ...):
 unable to load shared object '/builds/umr-g-eau/fairify/ci/lib/00LOCK-this.path/00new/this.path/libs/this.path.so':
  /builds/umr-g-eau/fairify/ci/lib/00LOCK-this.path/00new/this.path/libs/this.path.so: undefined symbol: R_mkClosure

Also use geospatial in order to limit package installations in CI