Get Rid of nobuild, nolink, and alldeps (#2765)

* Removing the nobuild, nolink, and alldeps dependency types in favor of being explicit.
* This will help with maintenance going forward, as adding more dependency types won't affect existing declared dependencies in weird ways.
* default deptype is still `('build', 'link')`

var/spack/repos/builtin/packages/gdal/package.py

@@ -63,7 +63,7 @@ class Gdal(Package):
     depends_on("libpng")
     depends_on("zlib")
     depends_on("proj")
-    depends_on("py-numpy", type=nolink)
+    depends_on("py-numpy", type=('build', 'run'))
 
     parallel = False