audio,ges,rtsp-server: Define GstObjectExt trait rename for docs

The generator does not read Gir.toml from dependencies, missing out on
trait renames like `ObjectExt` turning into GstObjectExt` (to prevent
clashes with `glib`'s `ObjectExt`).  Renaming through `trait_name` is
now taken into account in `gir` thanks to [1], but the renames still
need to be availble to all crates referencing this type.  Fortunately
only `Gst.Object` is affected - other renamed traits are not extended in
any of the other crates.

[1]: https://github.com/gtk-rs/gir/pull/1108

gstreamer-audio/Gir.toml

@@ -33,7 +33,6 @@ generate = [
 
 manual = [
     "GObject.Object",
-    "Gst.Object",
     "Gst.Element",
     "Gst.Allocator",
     "Gst.AllocationParams",
@@ -45,6 +44,12 @@ manual = [
     "GstAudio.AudioFormatInfo",
 ]
 
+[[object]]
+name = "Gst.Object"
+# For renaming the trait...
+status = "manual"
+trait_name = "GstObjectExt"
+
 [[object]]
 name = "Gst.Caps"
 status = "manual"

gstreamer-editing-services/Gir.toml

@@ -29,7 +29,6 @@ manual = [
     "GstPbutils.EncodingProfile",
     "GstPbutils.DiscovererInfo",
     "GstPbutils.DiscovererStreamInfo",
-    "Gst.Object",
     "Gst.Element",
     "Gst.Pad",
     "Gst.Pipeline",
@@ -47,6 +46,12 @@ generate = [
     "GES.VideoStandardTransitionType",
 ]
 
+[[object]]
+name = "Gst.Object"
+# For renaming the trait...
+status = "manual"
+trait_name = "GstObjectExt"
+
 [[object]]
 name = "Gst.Structure"
 status = "manual"

gstreamer-rtsp-server/Gir.toml

@@ -63,6 +63,12 @@ manual = [
     "GstRtsp.RTSPLowerTrans"
 ]
 
+[[object]]
+name = "Gst.Object"
+# For renaming the trait...
+status = "manual"
+trait_name = "GstObjectExt"
+
 [[object]]
 name = "Gst.Message"
 status = "manual"