nut: reflect conflict with nvhpc (#25023)

'random123' is a template library and cannot be compiled with nvhpc

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

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

@@ -24,11 +24,13 @@ class Nut(CMakePackage):
     depends_on('cmake@3.0:', type='build')
     depends_on('random123')
 
+    # The conflict with %nvhpc is inherited from random123,
+    # which is a C++ template library
+    conflicts('%nvhpc')
     conflicts('%intel', when='@serial')
     conflicts('%pgi', when='@serial')
     conflicts('%xl', when='@serial')
     conflicts('%nag', when='@serial')
-
     build_targets = ['VERBOSE=on']
 
     def setup_build_environment(self, env):