Update space parameters in 2D and 3D

Clarified space parameters for contacts and added missing ones.

List of changes:
-Add contact bias to space parameters
-Add solver iterations to space parameters, instead of a specific
physics server function
-Renamed BODY_MAX_ALLOWED_PENETRATION to CONTACT_MAX_ALLOWED_PENETRATION
to make it consistent with other contact parameters

servers/physics_server_2d.h

@@ -242,11 +242,13 @@ public:
 	enum SpaceParameter {
 		SPACE_PARAM_CONTACT_RECYCLE_RADIUS,
 		SPACE_PARAM_CONTACT_MAX_SEPARATION,
-		SPACE_PARAM_BODY_MAX_ALLOWED_PENETRATION,
+		SPACE_PARAM_CONTACT_MAX_ALLOWED_PENETRATION,
+		SPACE_PARAM_CONTACT_DEFAULT_BIAS,
 		SPACE_PARAM_BODY_LINEAR_VELOCITY_SLEEP_THRESHOLD,
 		SPACE_PARAM_BODY_ANGULAR_VELOCITY_SLEEP_THRESHOLD,
 		SPACE_PARAM_BODY_TIME_TO_SLEEP,
 		SPACE_PARAM_CONSTRAINT_DEFAULT_BIAS,
+		SPACE_PARAM_SOLVER_ITERATIONS,
 	};
 
 	virtual void space_set_param(RID p_space, SpaceParameter p_param, real_t p_value) = 0;
@@ -566,8 +568,6 @@ public:
 
 	virtual bool is_flushing_queries() const = 0;
 
-	virtual void set_collision_iterations(int p_iterations) = 0;
-
 	enum ProcessInfo {
 		INFO_ACTIVE_OBJECTS,
 		INFO_COLLISION_PAIRS,