Add missing dependencies to ccpp-scm template, add Python build utilities to base-env (JCSDA#1466)

* Add py-wheel, py-setuptools, py-setuptools-scm to base-env
* Add py-numpy and py-netcdf4 to ccpp-scm template

Author: climbfuji

configs/templates/ccpp-scm/spack.yaml

@@ -20,4 +20,5 @@ spack:
   - sp
   - w3emc
   - py-f90nml
-
+  - py-numpy
+  - py-netcdf4

spack-ext/repos/spack-stack/packages/base-env/package.py

@@ -38,5 +38,8 @@ class BaseEnv(BundlePackage):
     # Python
     depends_on("python@3.7:", type="run")
     depends_on("py-pip", type="run")
+    depends_on("py-wheel", type="run")
+    depends_on("py-setuptools", type="run")
+    depends_on("py-setuptools-scm", type="run")
 
     # There is no need for install() since there is no code.