refactor: [Optimize bitfield accessors] NetworkRigidBodyBase (#3906)

* Use NetworkManager field instead of property when available

* Update changelog

Author: noellie-velez

com.unity.netcode.gameobjects/CHANGELOG.md

@@ -12,6 +12,7 @@ Additional documentation and release notes are available at [Multiplayer Documen
 
 
 ### Changed
+- Improve performance of `NetworkRigidbodyBase`. (#3906)
 - Improve performance of `NetworkAnimator`. (#3905)
 
 ### Deprecated

com.unity.netcode.gameobjects/Runtime/Components/NetworkRigidBodyBase.cs

@@ -52,6 +52,7 @@ public abstract class NetworkRigidbodyBase : NetworkBehaviour
 #endif
 
 
+        private NetworkManager m_LocalNetworkManager;
         // Used to cache the authority state of this Rigidbody during the last frame
         private bool m_IsAuthority;
 
@@ -971,7 +972,7 @@ protected override void OnOwnershipChanged(ulong previous, ulong current)
         /// </remarks>
         internal void UpdateOwnershipAuthority()
         {
-            if (NetworkManager.DistributedAuthorityMode)
+            if (m_LocalNetworkManager.DistributedAuthorityMode)
             {
                 // When in distributed authority mode, always use HasAuthority
                 m_IsAuthority = HasAuthority;
@@ -980,7 +981,7 @@ internal void UpdateOwnershipAuthority()
             {
                 if (NetworkTransform.IsServerAuthoritative())
                 {
-                    m_IsAuthority = NetworkManager.IsServer;
+                    m_IsAuthority = m_LocalNetworkManager.IsServer;
                 }
                 else
                 {
@@ -994,11 +995,16 @@ internal void UpdateOwnershipAuthority()
             }
         }
 
+        internal override void InternalOnNetworkPreSpawn(ref NetworkManager networkManager)
+        {
+            m_LocalNetworkManager = networkManager;
+        }
+
         /// <inheritdoc />
         public override void OnNetworkSpawn()
         {
-            m_TickFrequency = 1.0f / NetworkManager.NetworkConfig.TickRate;
-            m_TickRate = NetworkManager.NetworkConfig.TickRate;
+            m_TickFrequency = 1.0f / m_LocalNetworkManager.NetworkConfig.TickRate;
+            m_TickRate = m_LocalNetworkManager.NetworkConfig.TickRate;
             UpdateOwnershipAuthority();
         }