Refactors team antagonists and roundend report handling (#69585)

* Refactors team antagonists and roundend report handling

Refactors teams and subtypes
* Makes use of ``as anything`` and ``\improper``
* Removes many single letter variables
* Moves team code to the team file
* Makes team objectives only allow objectives for SpacemanDMM
* Makes members and objectives clear when a team is deleted
* Generalizes team's add_objective
* Checks for show_roundend_report in roundend
* Replaces ``get_team == src`` with a simple mind check
* Makes Bloodbrothers fit using parent's endround report.
* Removes the unused procs ``is_solo`` and ``antag_listing_footer``
* Makes replaces ``get_team_antag`` ``specific`` with ``include_subtypes`` to be consistent with Antag helpers (and because I thought it looked better that way)

code/modules/admin/check_antagonists.dm

@@ -48,35 +48,6 @@
 	parts += antag_listing_commands()
 	return "<tr><td>[parts.Join("</td><td>")]</td></tr>"
 
-
-/datum/team/proc/get_team_antags(antag_type,specific = FALSE)
-	. = list()
-	for(var/datum/antagonist/A in GLOB.antagonists)
-		if(A.get_team() == src && (!antag_type || !specific && istype(A,antag_type) || specific && A.type == antag_type))
-			. += A
-
-//Builds section for the team
-/datum/team/proc/antag_listing_entry()
-	//NukeOps:
-	// Jim (Status) FLW PM TP
-	// Joe (Status) FLW PM TP
-	//Disk:
-	// Deep Space FLW
-	var/list/parts = list()
-	parts += "<b>[antag_listing_name()]</b><br>"
-	parts += "<table cellspacing=5>"
-	for(var/datum/antagonist/A in get_team_antags())
-		parts += A.antag_listing_entry()
-	parts += "</table>"
-	parts += antag_listing_footer()
-	return parts.Join()
-
-/datum/team/proc/antag_listing_name()
-	return name
-
-/datum/team/proc/antag_listing_footer()
-	return
-
 /datum/admins/proc/build_antag_listing()
 	var/list/sections = list()
 	var/list/priority_sections = list()