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-httpuv/package.py

@@ -40,4 +40,4 @@ class RHttpuv(RPackage):
 
     version('1.3.3', 'c78ae068cf59e949b9791be987bb4489')
 
-    depends_on('r-rcpp', type=nolink)
+    depends_on('r-rcpp', type=('build', 'run'))