Unused var: netdata_repoconfig_url

I noticed while working on my most recent PR that netdata_repoconfig_url does not appear to be used.

I suspect it's intended to be used at the very least in install-opensuse.yml in this task:

    - name: Add repository configuration
      community.general.zypper_repository:
        name: "netdata-repoconfig"
        repo: "{{ netdata_repository_url }}{{ netdata_release_channel_normalized }}/opensuse/{{ netdata_opensuse_releasever }}/$basearch"
        state: present
        auto_import_keys: true

Note the repo line refers to netdata_repository_url. It should probably be this:

    - name: Add repository configuration
      community.general.zypper_repository:
        name: "netdata-repoconfig"
        repo: "{{ netdata_repoconfig_url }}{{ netdata_release_channel_normalized }}/opensuse/{{ netdata_opensuse_releasever }}/$basearch"
        state: present
        auto_import_keys: true

This appears to be evidence that netdata_repository_url and netdata_repoconfig_url are easy to confuse. Probably for cleanliness we could ditch netdata_repoconfig_url altogether and bring netdata_repository_url back to its root location i.e. https://repo.netdata.cloud

The above task would then look like this:

    - name: Add repository configuration
      community.general.zypper_repository:
        name: "netdata-repoconfig"
        repo: "{{ netdata_repository_url }}/repoconfig/{{ netdata_release_channel_normalized }}/opensuse/{{ netdata_opensuse_releasever }}/$basearch"
        state: present
        auto_import_keys: true

Start in install-opensuse.yml at the “Add repository configuration” task, then trace the definitions and other references to netdata_repository_url and netdata_repoconfig_url. Compare the repository and repoconfig URL construction with the variable names and intended paths described in the issue. Done means the unused or confusing variable arrangement is resolved and the openSUSE repository task uses the correct configuration URL.