The charm exposes no-op options to operators

[Nobuto Murata]

The manila-ganesha inherits layer:openstack-api on purpose even though it doesn't offer any sort of OpenStack API service.

src/layer.yaml already has the following section not to expose OpenStack API related config options to operators:

config:
  deletes:
    - region
    - ssl_ca
    - ssl_cert
    - ssl_key

However, there are more no-op options exposed namely:

    - haproxy-server-timeout
    - haproxy-client-timeout
    - haproxy-queue-timeout
    - haproxy-connect-timeout
    - dns-ha
    - os-admin-hostname
    - os-admin-network
    - os-internal-hostname
    - os-internal-network
    - os-public-hostname
    - os-public-network

We can avoid confusions by hiding those no-op options.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/charm-manila-ganesha/+/892634

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/charm-manila-ganesha/+/892634
Committed: https://opendev.org/openstack/charm-manila-ganesha/commit/e46a056636e243940e04f63b5fc068caf2b2ddff
Submitter: "Zuul (22348)"
Branch: master

commit e46a056636e243940e04f63b5fc068caf2b2ddff
Author: Nobuto Murata <email address hidden>
Date: Thu Aug 24 11:36:04 2023 +0900

    Don't expose no-op options for OpenStack API service

    Manila-ganesha inherits layer:openstack-api on purpose to configure the
    manila-share and related services, but the units won't have OpenStack
    API endpoints by nature. We already have some config options excluded in
    layers.yaml but we should extend the list to exclude more no-op options
    related to OpenStack APIs so we can avoid confusing operators.

    Closes-Bug: #2032869
    Change-Id: Ic6dc3887bc3ca31e32acf81f7a0b6e6e3e73ba1c