add support for self clipping shape

adding support for self clipping shapes in cpp since there is a valid use case for it and flutter already supports it

Diffs=
a3788ed8a add support for self clipping shape (#6416)

Co-authored-by: hernan <hernan@rive.app>

.rive_head

diff --git a/.rive_head b/.rive_head
index 3eb61ea..eead455 100644
--- a/.rive_head
+++ b/.rive_head
@@ -1 +1 @@
-b58df4ba70205b17dbe8f4e8204d0a78becabeaa
+a3788ed8ad14d8046faec27d34c9483ddb7d7cb3

src/shapes/clipping_shape.cpp

diff --git a/src/shapes/clipping_shape.cpp b/src/shapes/clipping_shape.cpp
index 8d68908..cfa7f90 100644
--- a/src/shapes/clipping_shape.cpp
+++ b/src/shapes/clipping_shape.cpp
@@ -39,7 +39,7 @@
         // Iterate artboard to find shapes that are parented to the source,
         // their paths will need to be RenderPaths in order to be used for
         // clipping operations.
-        if (core->is<Shape>() && core != clippingHolder)
+        if (core->is<Shape>())
         {
             auto component = core->as<ContainerComponent>();
             while (component != nullptr)