Create RPMs for Nouveau and extend CouchDB RPM to optionally include Nouveau

The next version of CouchDB (3.4.0) will include a new component for full text search called _Nouveau_. Nouveau is a Java project that integrates with the rest of CouchDB which is written in Erlang.

We’d like the following scenarios to be handled:
- [ ] A user installs the regular Apache-CouchDB-3.4.0.rpm (the real name might be different) via `yum install couchdb`. They are not interested in Nouveau, so nothing changes for them. However, Nouveau binaries are installed on the system (this is partially already handled: https://github.com/apache/couchdb-pkg/blob/main/rpm/SPECS/couchdb.spec.in#L99-L103)
- [ ] Same as before, but user IS interested in Nouveau, they can run `yum install couchdb-nouveau` _on the same server_ and get Apache-CouchDB-Nouveau-3.4.0.rpm installed on the same system and now the following happens:
- [ ] the installation of Nouveau creates a new config file in the CouchDB conf.d dir at `/opt/couchdb/etc/local.d/nouveau.ini`
- [ ] the installation calls the `/_node/_local/_config/_reload` endpoint to activate the new config file, or prompts to restart CouchDB, or directly restarts CouchDB.
- [ ] A user wants to run Nouveau on a _separate_ server, so the Apache-CouchDB-Nouveau-3.4.0.rpm installation should _not_ try to augment the `local.d` config dir and reload CouchDB config, as it has no access to it.

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We have this working for the Debian packages, look there for inspiration: https://github.com/apache/couchdb-pkg/tree/main/debian