Lhapdf extends python (#19398)

* Add recipe for qgraf

* Revert "Add recipe for qgraf"

This reverts commit 76783f7386.

* LHAPDF should extend Python to get env variables correct

Co-authored-by: Ivan Razumov <ivan.razumov@cern.ch>

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

@@ -27,6 +27,8 @@ class Lhapdf(AutotoolsPackage):
     depends_on('boost',         type='build')
     depends_on('yaml-cpp',      type='build', when='@:6.1.5')
 
+    extends('python')
+
     def configure_args(self):
         args = ['--with-boost=' + self.spec['boost'].prefix,
                 'FCFLAGS=-O3', 'CFLAGS=-O3', 'CXXFLAGS=-O3']