Add: Constants for (new) station and roadstop animation and random triggers.

[frosch123]

• There are two new animation triggers for stations and roadstops since Add: [NewGRF] Station/roadstop animation-triggers 'tile loop' (bit 7) and 'path reservation' (bit 8). OpenTTD#14080.
• Stations used a different naming pattern for animation triggers than other features, so add new constants.
• Add missing roadstop random triggers.

[glx22]

There's an integrated deprecation mechanism:

Suggested change

	"OBJ_ANIM_IS_BUILT" : 0, # deprecated
	"OBJ_ANIM_PERIODIC" : 1, # deprecated
	"OBJ_ANIM_SYNC" : 2, # deprecated
	"OBJ_ANIM_IS_BUILT" : "ANIM_TRIGGER_OBJ_BUILT",
	"OBJ_ANIM_PERIODIC" : "ANIM_TRIGGER_OBJ_TILELOOP",
	"OBJ_ANIM_SYNC" : "ANIM_TRIGGER_OBJ_256_TICKS",

Same applies to station anim.