Fix policy doc for host_status and extended servers attribute

In microversion 2.75, host_status and extended-server-attributes
were added in PUT /servers/{server-id} and POST /servers/action {rebuild }
API response with respective policy enforcement[1].

But PUT and rebuild APIs were missed to mentioned in policy doc
for 'os_compute_api:servers:show:host_status'
'os_compute_api:os-extended-server-attributes'

- https://docs.openstack.org/nova/latest/configuration/policy.html

Closes-Bug: #1849164

[1]
964d7dc879/nova/api/openstack/compute/servers.py (L854)

964d7dc879/nova/api/openstack/compute/servers.py (L1161)

Change-Id: Ifac1e60f5c8d9c5e3a0a9dacc398c339c2216689

nova/policies/extended_server_attributes.py

@@ -38,6 +38,10 @@ This rule will control the visibility for a set of servers attributes:
 - ``OS-EXT-SRV-ATTR:ramdisk_id`` (since microversion 2.3)
 - ``OS-EXT-SRV-ATTR:root_device_name`` (since microversion 2.3)
 - ``OS-EXT-SRV-ATTR:user_data`` (since microversion 2.3)
+
+Microvision 2.75 added the above attributes in the ``PUT /servers/{server_id}``
+and ``POST /servers/{server_id}/action (rebuild)`` API responses which are
+also controlled by this policy rule, like the ``GET /servers*`` APIs.
 """,
         [
             {
@@ -47,6 +51,14 @@ This rule will control the visibility for a set of servers attributes:
             {
                 'method': 'GET',
                 'path': '/servers/detail'
+            },
+            {
+                'method': 'PUT',
+                'path': '/servers/{server_id}'
+            },
+            {
+                'method': 'POST',
+                'path': '/servers/{server_id}/action (rebuild)'
             }
         ]
     ),

nova/policies/servers.py

@@ -92,7 +92,14 @@ rules = [
     policy.DocumentedRuleDefault(
         SERVERS % 'show:host_status',
         base.RULE_ADMIN_API,
-        "Show a server with additional host status information",
+        """
+Show a server with additional host status information.
+
+Microvision 2.75 added the ``host_status`` attribute in the
+``PUT /servers/{server_id}`` and ``POST /servers/{server_id}/action (rebuild)``
+API responses which are also controlled by this policy rule, like the
+``GET /servers*`` APIs.
+""",
         [
             {
                 'method': 'GET',
@@ -101,6 +108,14 @@ rules = [
             {
                 'method': 'GET',
                 'path': '/servers/detail'
+            },
+            {
+                'method': 'PUT',
+                'path': '/servers/{server_id}'
+            },
+            {
+                'method': 'POST',
+                'path': '/servers/{server_id}/action (rebuild)'
             }
         ]),
     policy.DocumentedRuleDefault(