Renames delta time to be a more obvious name (#74654)

This tracks the seconds per tick of a subsystem, however note that it is
not completely accurate, as subsystems can be delayed, however it's
useful to have this number as a multiplier or ratio, so that if in
future someone changes the subsystem wait time code correctly adjusts
how fast it applies effects

regexes used

git grep --files-with-matches --name-only 'DT_PROB' | xargs -l sed -i
's/DT_PROB/SPT_PROB/g'
git grep --files-with-matches --name-only 'delta_time' | xargs -l sed -i
's/delta_time/seconds_per_tick/g'

code/modules/modular_computers/file_system/programs/airestorer.dm

@@ -34,7 +34,7 @@
 	try_eject(forced = TRUE)
 	return ..()
 
-/datum/computer_file/program/ai_restorer/process_tick(delta_time)
+/datum/computer_file/program/ai_restorer/process_tick(seconds_per_tick)
 	. = ..()
 	if(!restoring) //Put the check here so we don't check for an ai all the time
 		return

code/modules/modular_computers/file_system/programs/alarm.dm

@@ -26,7 +26,7 @@
 	QDEL_NULL(alert_control)
 	return ..()
 
-/datum/computer_file/program/alarm_monitor/process_tick(delta_time)
+/datum/computer_file/program/alarm_monitor/process_tick(seconds_per_tick)
 	..()
 
 	if(has_alert)

code/modules/modular_computers/file_system/programs/antagonist/dos.dm

@@ -16,7 +16,7 @@
 	var/error = ""
 	var/executed = 0
 
-/datum/computer_file/program/ntnet_dos/process_tick(delta_time)
+/datum/computer_file/program/ntnet_dos/process_tick(seconds_per_tick)
 	dos_speed = 0
 	switch(ntnet_status)
 		if(1)

code/modules/modular_computers/file_system/programs/borg_monitor.dm

@@ -40,7 +40,7 @@
 	borgo.logevent("File request by [username]: /var/logs/syslog")
 	return TRUE
 
-/datum/computer_file/program/borg_monitor/process_tick(delta_time)
+/datum/computer_file/program/borg_monitor/process_tick(seconds_per_tick)
 	if(!DL_source)
 		DL_progress = -1
 		return

code/modules/modular_computers/file_system/programs/ntdownloader.dm

@@ -81,7 +81,7 @@
 	download_completion = FALSE
 	ui_header = "downloader_finished.gif"
 
-/datum/computer_file/program/ntnetdownload/process_tick(delta_time)
+/datum/computer_file/program/ntnetdownload/process_tick(seconds_per_tick)
 	if(!downloaded_file)
 		return
 	if(download_completion >= downloaded_file.size)

code/modules/modular_computers/file_system/programs/ntnrc_client.dm

@@ -176,7 +176,7 @@
 			COOLDOWN_START(src, ping_cooldown, PING_COOLDOWN_TIME)
 			return TRUE
 
-/datum/computer_file/program/chatclient/process_tick(delta_time)
+/datum/computer_file/program/chatclient/process_tick(seconds_per_tick)
 	. = ..()
 	var/datum/ntnet_conversation/channel = SSmodular_computers.get_chat_channel_by_id(active_channel)
 	if(program_state != PROGRAM_STATE_KILLED)

code/modules/modular_computers/file_system/programs/powermonitor.dm

@@ -31,7 +31,7 @@
 	history["demand"] = list()
 
 
-/datum/computer_file/program/power_monitor/process_tick(delta_time)
+/datum/computer_file/program/power_monitor/process_tick(seconds_per_tick)
 	if(!get_powernet())
 		search()
 	else

code/modules/modular_computers/file_system/programs/radar.dm

@@ -196,7 +196,7 @@
 	computer.setDir(get_dir(here_turf, target_turf))
 
 //We can use process_tick to restart fast processing, since the computer will be running this constantly either way.
-/datum/computer_file/program/radar/process_tick(delta_time)
+/datum/computer_file/program/radar/process_tick(seconds_per_tick)
 	if(computer.active_program == src)
 		START_PROCESSING(SSfastprocess, src)
 

code/modules/modular_computers/file_system/programs/sm_monitor.dm

@@ -106,7 +106,7 @@
 	for(var/obj/machinery/power/supermatter_crystal/S in supermatters)
 		. = max(., S.get_status())
 
-/datum/computer_file/program/supermatter_monitor/process_tick(delta_time)
+/datum/computer_file/program/supermatter_monitor/process_tick(seconds_per_tick)
 	..()
 	var/new_status = get_status()
 	if(last_status != new_status)