[Rpm-maint] [rpm-software-management/rpm] Arguments are not propagate into global lua macro (Issue #2910)

[Vít Ondruch]

**Describe the bug**

It seems that global lua macro does not have correctly populated arguments.


**To Reproduce**

This seems to work as expected:

~~~
$ cat newpackage.spec | head -11
%define foo(a:b) %{lua:
if #arg == 0 then
   print('no arguments :(')
else
   for i = 1, #arg do
      print(arg[i])
   end
end
}

%{foo bar}

$ rpmbuild -D "_sourceddir ." -D "_srpmdir ." -bs newpackage.spec 
error: line 11: Unknown tag: bar
~~~

IOW it outputs `bar` into the .spec file and therefore the rpmbuild fails. So far so good. However:

~~~
$ sed -i "/foo(/ s/define/global/" newpackage.spec

$ cat newpackage.spec | head -11
%global foo(a:b) %{lua:
if #arg == 0 then
   print('no arguments :(')
else
   for i = 1, #arg do
      print(arg[i])
   end
end
}

%{foo bar}

$ rpmbuild -D "_sourceddir ." -D "_srpmdir ." -bs newpackage.spec 
error: line 11: Unknown tag: no arguments :(
~~~

IOW this evals the `#arg` to zero and prints the `no arguments :(` message from the associated branch.

**Expected behavior**

The `%global` version should either:

1. Behave the same as `%define` and correctly process arguments.

or 

2. Should refuse such use.

**Environment**
 - OS / Distribution: Fedora Rawhide 
 - Version: rpm-4.19.1-4.fc40.x86_64


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