[DOC] Add security service update for in-use share networks

[Carlos Eduardo]

Description
===========

Update manila documentation to make it compliant with this change: https://review.opendev.org/c/openstack/manila/+/774728, which was merged during the Wallaby cycle.

Add security service update for in-use share networks

This patch implements the update of security service's association
with in-use share networks. The following changes were added:

 - New share network APIs: `share_network_security_service_update`
 and `share_network_reset_state`.

 - A new `status` attribute was added to share network model to
 identify when it's in a modification state, called 'network_change'.
 Other supported status that were added: 'active' and 'error'.

 - New 'security_service_update_support' property was added to both
 share server and share network models, to identify when this resources
 are able to process security service update for in-use share networks.

 - New driver interface was added to support update of security service's
 configuration of a given share server.

DocImpact
APIImpact
Partially Implements: bp add-security-service-in-use-share-networks

Co-Authored-By: Carlos Eduardo <email address hidden>
Co-Authored-By: Douglas Viroel <email address hidden>
Co-Authored-By: Andre Beltrami <email address hidden>

Change-Id: I129a794dfd2d179fa2b9a2fed050459d6f00b0de

[Vida Haririan (vhariria)]

Additional comments http://eavesdrop.openstack.org/meetings/manila/2021/manila.2021-04-08-15.00.log.html

[Goutham Pacha Ravi (gouthamr)]

Fixes here:

https://review.opendev.org/c/openstack/manila/+/786048
https://review.opendev.org/c/openstack/manila/+/786052

[Carlos Eduardo (silvacarlose)]

Both changes were merged but unfortunately none of them had the closes-bug tag. I will close this bug!