Changes all .len to length() where applicable (#25174)

* Globals work

* Double access works

* All other things

* Revert "All other things"

This reverts commit 6574442eb6.

* More changes that compile and work

* IT WORKS AAAAAA

* Changes even more .len to length()

* Apply suggestions from code review

* Update code/datums/mind.dm

* Update code/__HELPERS/sorts/InsertSort.dm

Co-authored-by: Deniz <66401072+Oyu07@users.noreply.github.com>

* Update code/__HELPERS/sanitize_values.dm

Co-authored-by: Deniz <66401072+Oyu07@users.noreply.github.com>

---------

Co-authored-by: FunnyMan3595 (Charlie Nolan) <funnyman@google.com>
Co-authored-by: Deniz <66401072+Oyu07@users.noreply.github.com>

code/modules/power/engines/singularity/field_generator.dm

@@ -45,7 +45,7 @@ GLOBAL_LIST_EMPTY(field_generator_fields)
 	. = ..()
 	if(warming_up)
 		. += "+a[warming_up]"
-	if(fields.len)
+	if(length(fields))
 		. += "+on"
 	if(power_level)
 		. += "+p[power_level]"
@@ -182,7 +182,7 @@ GLOBAL_LIST_EMPTY(field_generator_fields)
 
 
 /obj/machinery/field/generator/proc/calc_power()
-	var/power_draw = 2 + fields.len
+	var/power_draw = 2 + length(fields)
 
 	if(draw_power(round(power_draw/2, 1)))
 		check_power_level()
@@ -333,11 +333,11 @@ GLOBAL_LIST_EMPTY(field_generator_fields)
 		O.last_warning = world.time
 
 /obj/machinery/field/generator/shock_field(mob/living/user)
-	if(fields.len)
+	if(length(fields))
 		..()
 
 /obj/machinery/field/generator/bump_field(atom/movable/AM as mob|obj)
-	if(fields.len)
+	if(length(fields))
 		..()
 
 #undef FG_UNSECURED