[Refactor] (CMakeLists.txt, MG_Backend, MG_Backend/DirectVulkan, MG_Impl/GLImpl, MG_Impl/Pipe, MG_IntegrationTest/Scenarios, MG_Pipe/generated, MG_Remote/Client, MG_Test/Query, MG_Test/Texture, scripts, scripts/data): move the function table and shared-image types out of BackendObject.h

- BackendFunctions.h holds GLFunctionsTable, GlobalBackendFunctionsTable, CopyImageEndpoint, the sync and query handles and the present damage; files that only call through the table include it instead of the backend object
- SharedImageTypes.h holds the shared-image structs
- FormatCapabilities.cpp holds the BackendCaps.h helpers that BackendObject.cpp defined
- gen_pipe.py reads the table from its new header
- two comments that cited a BackendObject.cpp line name the function instead

MobileGL/MG_Remote/Client/BackendObject_Remote.cpp

@@ -436,7 +436,7 @@ namespace MobileGL::MG_Remote::Client {
 
     Bool BackendObject_Remote::SwapEGLBuffers(EGLDisplay dpy, EGLSurface draw) {
         // NOT FORWARDED, and this is the one that must not be. The base implementation's last
-        // act is GetBackendFunctions().Present() (BackendObject.cpp:396) - which is this
+        // act is GetBackendFunctions().Present() - which is this
         // client's class-B Present EMITTER, the only route by which Present is reached at all
         // (it has zero MG_Impl call sites). Calling Server::ServerSwapEGLBuffers would present
         // on the server directly and put no record on the wire, which is the shape every gate

MobileGL/MG_Remote/Client/EmitTables.h

@@ -18,7 +18,7 @@
 #pragma once
 #include <Includes.h>
 
-#include <MG_Backend/BackendObject.h>
+#include <MG_Backend/BackendFunctions.h>
 // P5b: the clear discriminants below alias MGPipeTypes.h's (CONTRACT-P5B.md f1). The header
 // was already in this file's closure through BackendObject.h's neighbours; naming it makes
 // the dependency the aliases have explicit.

MobileGL/MG_Remote/Client/SlotCaps.h

@@ -19,7 +19,7 @@
 #include <Includes.h>
 
 #include <Config.h>
-#include <MG_Backend/BackendObject.h>
+#include <MG_Backend/BackendFunctions.h>
 
 #if MOBILEGL_BUILD_DISAGGREGATED
 #include <MG_Pipe/MGPipeTypes.h>