gnupg: create a gpg2 symlink on install (#23789)

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

@@ -43,6 +43,11 @@ class Gnupg(AutotoolsPackage):
     depends_on('iconv')
     depends_on('zlib')
 
+    @run_after('install')
+    def add_gpg2_symlink(self):
+        if self.spec.satisfies("@2.0:2.999"):
+            symlink('gpg', self.prefix.bin.gpg2)
+
     def configure_args(self):
         args = [
             '--disable-bzip2',