feat: add hostNetwork support for the Konnectivity Agent (#883)

This commit extends CRD API: Added hostNetwork field to KonnectivityAgentSpec struct.
It's false by default so it's backwards compatible.

Signed-off-by: Dario Tranchitella <dario@tranchitella.eu>

docs/content/reference/api.md

@@ -39626,6 +39626,18 @@ parameters and cause konnectivity components to misbehave in
 unxpected ways. Only modify if you know what you are doing.<br/>
         </td>
         <td>false</td>
+      </tr><tr>
+        <td><b>hostNetwork</b></td>
+        <td>boolean</td>
+        <td>
+          HostNetwork enables the konnectivity agent to use the Host network namespace.
+By enabling this mode, the Agent doesn't need to wait for the CNI initialisation,
+enabling a sort of out-of-band access to nodes for troubleshooting scenarios,
+or when the agent needs direct access to the host network.<br/>
+          <br/>
+            <i>Default</i>: false<br/>
+        </td>
+        <td>false</td>
       </tr><tr>
         <td><b>image</b></td>
         <td>string</td>