test: use filter module callback helpers

So the callback signature is matching what is expected.

test/modules/stream_out/transcode.c

@@ -373,16 +373,13 @@ vlc_module_begin()
         add_shortcut("output_checker")
 
     add_submodule()
-        set_callback(OpenDecoderDevice)
-        set_capability("decoder device", 0)
+        set_callback_dec_device(OpenDecoderDevice, 0)
 
     add_submodule()
-        set_callback(OpenFilter)
-        set_capability("video filter", 0)
+        set_callback_video_filter(OpenFilter)
 
     add_submodule()
-        set_callback(OpenConverter)
-        set_capability("video converter", INT_MAX)
+        set_callback_video_converter(OpenConverter, INT_MAX)
 
     add_submodule()
         set_callback(OpenEncoder)

test/src/input/decoder/input_decoder.c

@@ -305,8 +305,7 @@ vlc_module_begin()
 
 
     add_submodule()
-        set_callback(OpenDecoderDevice)
-        set_capability("decoder device", 0)
+        set_callback_dec_device(OpenDecoderDevice, 0)
 
     add_submodule()
         set_callbacks(OpenDecoder, CloseDecoder)

test/src/misc/image.c

@@ -129,8 +129,7 @@ vlc_module_begin()
     set_capability("image encoder", INT_MAX)
 
     add_submodule()
-        set_callback(OpenConverter)
-        set_capability("video converter", INT_MAX)
+        set_callback_video_converter(OpenConverter, INT_MAX)
 
     add_submodule()
         set_callback(OpenIntf)

test/src/video_output/opengl.c

@@ -177,8 +177,7 @@ OpenOpenGLESOffscreen(vlc_gl_t *gl, unsigned width, unsigned height,
  *  - opengl offscreen for generating video context and using decoder device
  **/
 vlc_module_begin()
-    set_callback(OpenDecoderDevice)
-    set_capability("decoder device", 1000)
+    set_callback_dec_device(OpenDecoderDevice, 1000)
     add_shortcut("test_offscreen")
 
     add_submodule()

test/src/video_output/video_output.c

@@ -254,24 +254,20 @@ vlc_module_begin()
     set_capability("video decoder", INT_MAX)
 
     add_submodule()
-        set_callback(OpenDecoderDevice)
-        set_capability("decoder device", 0)
+        set_callback_dec_device(OpenDecoderDevice, 0)
 
     add_submodule()
-        set_callback(OpenFilter)
-        set_capability("video filter", 0)
+        set_callback_video_filter(OpenFilter)
 
     add_submodule()
-        set_callback(OpenConverter)
-        set_capability("video converter", INT_MAX)
+        set_callback_video_converter(OpenConverter, INT_MAX)
 
     add_submodule()
         set_callback(OpenWindow)
         set_capability("vout window", INT_MAX)
 
     add_submodule()
-        set_callback(OpenDisplay)
-        set_capability("vout display", 0)
+        set_callback_display(OpenDisplay, 0)
 
     /* Interface module to avoid casting libvlc_instance_t to object */
     add_submodule()