Makes admin outfits set offstation_role to true and give syndicate factions to SIT and SST. (#22169)

* Update outfit_admin.dm

* add trailing newline

* GDN suggestion

* Update code/datums/outfits/outfit_admin.dm

Co-authored-by: Contrabang <91113370+Contrabang@users.noreply.github.com>

* Update code/datums/outfits/outfit_admin.dm

Co-authored-by: Contrabang <91113370+Contrabang@users.noreply.github.com>

* Update code/datums/outfits/outfit_admin.dm

Co-authored-by: GDN <96800819+GDNgit@users.noreply.github.com>

* Contrabang suggestion

* Update code/modules/mob/living/carbon/human/human_mob.dm

Co-authored-by: Contrabang <91113370+Contrabang@users.noreply.github.com>

* Update code/modules/mob/living/carbon/human/human_mob.dm

Co-authored-by: Luc <89928798+lewcc@users.noreply.github.com>

---------

Co-authored-by: Contrabang <91113370+Contrabang@users.noreply.github.com>
Co-authored-by: GDN <96800819+GDNgit@users.noreply.github.com>
Co-authored-by: Luc <89928798+lewcc@users.noreply.github.com>

code/modules/mob/living/carbon/human/human_login.dm

@@ -7,4 +7,5 @@
 		to_chat(src, "<span class='notice'>You can ventcrawl! Use alt+click on vents to quickly travel about the station.</span>")
 	update_pipe_vision()
 	regenerate_icons()
+	SEND_SIGNAL(src, COMSIG_HUMAN_LOGIN)
 	return

code/modules/mob/living/carbon/human/human_mob.dm

@@ -2179,3 +2179,7 @@ Eyes need to have significantly high darksight to shine unless the mob has the X
 	set category = "IC"
 
 	update_flavor_text()
+	
+/mob/living/carbon/human/proc/apply_offstation_roles(source)
+	SIGNAL_HANDLER
+	mind.offstation_role = TRUE