(API Change) libobs: Use single func for base effects

API removed:
--------------------
gs_effect_t *obs_get_default_effect(void);
gs_effect_t *obs_get_default_rect_effect(void);
gs_effect_t *obs_get_opaque_effect(void);
gs_effect_t *obs_get_solid_effect(void);
gs_effect_t *obs_get_bicubic_effect(void);
gs_effect_t *obs_get_lanczos_effect(void);
gs_effect_t *obs_get_bilinear_lowres_effect(void);

API added:
--------------------
gs_effect_t *obs_get_base_effect(enum obs_base_effect effect);

Summary:
--------------------
Combines multiple near-identical functions into a single function with
an enum parameter.

plugins/win-capture/monitor-capture.c

@@ -147,7 +147,8 @@ static void monitor_capture_tick(void *data, float seconds)
 static void monitor_capture_render(void *data, gs_effect_t *effect)
 {
 	struct monitor_capture *capture = data;
-	dc_capture_render(&capture->data, obs_get_opaque_effect());
+	dc_capture_render(&capture->data,
+			obs_get_base_effect(OBS_EFFECT_OPAQUE));
 
 	UNUSED_PARAMETER(effect);
 }