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/r-memoise/package.py

@@ -35,4 +35,4 @@ class RMemoise(RPackage):
 
     version('1.0.0', 'd31145292e2a88ae9a504cab1602e4ac')
 
-    depends_on('r-digest', type=nolink)
+    depends_on('r-digest', type=('build', 'run'))