Various /tg/ port fixes (+ meteor shield holomap fix) (#3020)

* fixes elevation being permanent if you spawn on it (#85952)

## About The Pull Request

1 line change that makes spawning on stuff such as table not offset you
forever

## Why It's Good For The Game

fixes #84121

## Changelog
:cl:
fix: spawning on a table or other elevated object does not offset you
forever
/:cl:

* Fix multi-z meteor shield coverage on holomaps being inaccurate

* [NO GBP] Star Gazer Fixes (#78003)

## About The Pull Request
Star Gazer can be buckled which stops the Star Gazer from being able to
move which isn't supposed to happen. Also removes Star Gazer alpha
pixels which where created because it used to have a limited amount of
health, but now it isn't needed and seems like it will only be in the
way.
## Why It's Good For The Game
Improvements.
## Changelog
:cl:
fix: Fixes Star Gazer getting buckled
image: Removes Star Gazer alpha pixels
/:cl:

* Clean up blood brother teams if all members are removed (#85819)

## About The Pull Request

Currently, if you remove someone's BB status, and there's no more
members on the team - the empty BB team will still exist, and appear on
the roundend report.

## Why It's Good For The Game

No reason for empty teams to exist, and they clog up the roundend
report.

## Changelog
:cl:
fix: Empty blood brother teams will now be cleaned up, instead of
clogging up the roundend report.
/:cl:

---------

Co-authored-by: jimmyl <[email protected]>
Co-authored-by: Comxy <[email protected]>

Author: 3 people

code/datums/elements/elevation.dm

@@ -151,8 +151,8 @@
 
 /datum/element/elevation_core/proc/on_initialized_on(turf/source, atom/movable/spawned)
 	SIGNAL_HANDLER
-	if(isliving(spawned))
-		elevate_mob(spawned)
+	if(isliving(spawned) && !HAS_TRAIT(spawned, TRAIT_ON_ELEVATED_SURFACE))
+		on_entered(entered = spawned)
 
 /datum/element/elevation_core/proc/on_exited(turf/source, atom/movable/gone)
 	SIGNAL_HANDLER

code/modules/antagonists/brother/brother.dm

@@ -210,6 +210,9 @@
 		return
 	. = ..()
 	member.remove_antag_datum(/datum/antagonist/brother)
+	if (!length(members))
+		qdel(src)
+		return
 	if (isnull(member.current))
 		return
 	for (var/datum/mind/brother_mind as anything in members)

code/modules/mob/living/basic/heretic/star_gazer.dm

@@ -31,6 +31,7 @@
 	move_force = MOVE_FORCE_OVERPOWERING
 	move_resist = MOVE_FORCE_OVERPOWERING
 	pull_force = MOVE_FORCE_OVERPOWERING
+	can_buckle_to = FALSE
 	mob_size = MOB_SIZE_HUGE
 	layer = LARGE_MOB_LAYER
 	plane = GAME_PLANE_UPPER_FOV_HIDDEN

icons/mob/nonhuman-player/96x96eldritch_mobs.dmi

@@ -18,7 +18,7 @@ GLOBAL_LIST_EMPTY_TYPED(meteor_shield_fields, /datum/proximity_monitor/advanced/
 /datum/proximity_monitor/advanced/meteor_shield/setup_field_turf(turf/open/target)
 	if(!isgroundlessturf(target))
 		return
-	if(true_host.check_los(get_turf(true_host), target))
+	if(true_host.check_los(get_turf(host), target))
 		ADD_TRAIT(target, TRAIT_COVERED_BY_METEOR_SHIELD, REF(src))
 		target.AddElement(/datum/element/meteor_shield_coverage)