opengl: Rename to _private EGL and GLX context header

Both only contains private symbols, clarify this by using a very explicit
name.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9306>

subprojects/gst-plugins-base/gst-libs/gst/gl/android/gstglwindow_android_egl.c

@@ -30,7 +30,7 @@
 
 #include <gst/gst.h>
 
-#include <gst/gl/egl/gstglcontext_egl.h>
+#include <gst/gl/egl/gstglcontext_egl_private.h>
 #include "gstglwindow_android_egl.h"
 #include "../gstglwindow_private.h"
 

subprojects/gst-plugins-base/gst-libs/gst/gl/egl/gsteglimage.c

@@ -47,7 +47,7 @@
 #include <gst/gl/gstglmemory.h>
 
 #include "gst/gl/egl/gstegl.h"
-#include "gst/gl/egl/gstglcontext_egl.h"
+#include "gst/gl/egl/gstglcontext_egl_private.h"
 #include "gst/gl/egl/gstgldisplay_egl.h"
 
 #if GST_GL_HAVE_DMABUF

subprojects/gst-plugins-base/gst-libs/gst/gl/egl/gstglcontext_egl.c

@@ -28,7 +28,7 @@
  * may need to box it.
  */
 
-#include "gstglcontext_egl.h"
+#include "gstglcontext_egl_private.h"
 
 #include <gst/gl/gl.h>
 #include <gst/gl/gstglcontext_private.h>

subprojects/gst-plugins-base/gst-libs/gst/gl/egl/gstglmemoryegl.c

@@ -44,7 +44,7 @@
 
 #include "gstegl.h"
 #include "gsteglimage.h"
-#include "gstglcontext_egl.h"
+#include "gstglcontext_egl_private.h"
 
 static GstAllocator *_gl_memory_egl_allocator;
 

subprojects/gst-plugins-base/gst-libs/gst/gl/gbm/gstglwindow_gbm_egl.c

@@ -25,7 +25,7 @@
 
 #include "../gstgl_fwd.h"
 #include <gst/gl/gstglcontext.h>
-#include <gst/gl/egl/gstglcontext_egl.h>
+#include <gst/gl/egl/gstglcontext_egl_private.h>
 
 #include "gstgldisplay_gbm.h"
 #include "gstglwindow_gbm_egl.h"

subprojects/gst-plugins-base/gst-libs/gst/gl/gstglcontext.c

@@ -73,10 +73,10 @@
 #endif
 
 #if GST_GL_HAVE_PLATFORM_GLX
-#include "x11/gstglcontext_glx.h"
+#include "x11/gstglcontext_glx_private.h"
 #endif
 #if GST_GL_HAVE_PLATFORM_EGL
-#include "egl/gstglcontext_egl.h"
+#include "egl/gstglcontext_egl_private.h"
 #endif
 #if GST_GL_HAVE_PLATFORM_CGL
 #include "cocoa/gstglcontext_cocoa.h"

subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c

@@ -34,7 +34,7 @@
 #include "egl/gsteglimage_private.h"
 #include "egl/gsteglimagecache.h"
 #include "egl/gstglmemoryegl.h"
-#include "egl/gstglcontext_egl.h"
+#include "egl/gstglcontext_egl_private.h"
 #endif
 
 #if GST_GL_HAVE_DMABUF

subprojects/gst-plugins-base/gst-libs/gst/gl/gstglutils.c

@@ -46,7 +46,7 @@
 #endif
 
 #if GST_GL_HAVE_PLATFORM_EGL
-#include "egl/gstglcontext_egl.h"
+#include "egl/gstglcontext_egl_private.h"
 #include "egl/gsteglimage.h"
 #if GST_GL_HAVE_DMABUF
 #ifdef HAVE_LIBDRM

subprojects/gst-plugins-base/gst-libs/gst/gl/winrt/gstglwindow_winrt_egl.cpp

@@ -23,7 +23,7 @@
 #endif
 
 #include <gst/gl/gstglcontext.h>
-#include <gst/gl/egl/gstglcontext_egl.h>
+#include <gst/gl/egl/gstglcontext_egl_private.h>
 
 #include "gstglwindow_winrt_egl.h"
 #include "../gstglwindow_private.h"

subprojects/gst-plugins-base/gst-libs/gst/gl/x11/gstglcontext_glx.c

@@ -35,7 +35,7 @@
 #include <gst/gl/gstglcontext.h>
 
 #include <gst/gl/gl.h>
-#include "gstglcontext_glx.h"
+#include "gstglcontext_glx_private.h"
 #include "../utils/opengl_versions.h"
 #include "../gstglcontext_private.h"
 

subprojects/gst-plugins-base/tests/check/libs/gstgl-public-headers.h

@@ -3,7 +3,7 @@
 
 #if GST_GL_HAVE_PLATFORM_EGL
 #include <gst/gl/egl/gstgldisplay_egl.h>
-#include <gst/gl/egl/gstglcontext_egl.h>
+#include <gst/gl/egl/gstglcontext_egl_private.h>
 #include <gst/gl/egl/gstglmemoryegl.h>
 #endif