[Rpm-maint] [rpm-software-management/rpm] Add rpmlua wrapper command for running our Lua interpreter standalone (PR #1867)

[Miro Hrončok]

iLua has been fixed on rawhide (Koji repo only for now).

```
$ mock -r fedora-rawhide-x86_64 --addrepo='https://download.copr.fedorainfracloud.org/results/pmatilai/rpm-snapshot/fedora-rawhide-$basearch/' --enablerepo=local install /usr/bin/rpmlua /usr/bin/ilua
$ mock -r fedora-rawhide-x86_64 shell --unpriv
...
<mock-chroot> sh-5.1$ cat rpmlua-wrapper 
#!/usr/bin/sh -eu
/usr/bin/rpmlua -e 'package.path =  os.getenv("LUA_PATH") .. ";" .. package.path' "$@"

<mock-chroot> sh-5.1$ ilua -i /builddir/rpmlua-wrapper
Jupyter console 6.4.0

ILua 0.2.1
In [1]: rpm.expand
Out[1]: <function 1>

In [2]: rpm.expand('%_arch')
Out[2]: "x86_64"
```

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