Exclude id from NetworkImpl.NetworkImplBuilder (#8125) (#2807)

* Exclude id from NetworkImpl.NetworkImplBuilder (#8125)

* Deprecate Network.id field

The field is deprecated in order to mark the NetworkBuildImpl#id method
deprecated so that the method can later be removed.  We'll undeprecate the
field at that time.

Co-authored-by: Richard North <rich.north@gmail.com>

core/src/main/java/org/testcontainers/containers/Network.java

@@ -52,6 +52,7 @@ class NetworkImpl extends ExternalResource implements Network {
         @Singular
         private Set<Consumer<CreateNetworkCmd>> createNetworkCmdModifiers;
 
+        @Deprecated
         private String id;
 
         private final AtomicBoolean initialized = new AtomicBoolean();