Buff to MODsuit deployment time (#85705)

## About The Pull Request
Before it took 12 seconds to fully deploy (2 seconds per part) so it's
just an awkward standing around moment while you wait for your MOD to
activate in front of the airlock.
- Increased speed of MODsuit deploy time by 2 times
- Increased speed of infiltrator MODsuit deploy time by 4 times
## Why It's Good For The Game
One of the reasons why so many players are deterred from MODsuits is how
long the deployment or undeployment takes.
This change should increase the desire for players to use MODsuits and
will raise their value, giving more incentive to produce more, which
roboticists barely ever do.

The infiltrator MODsuit is supposed to be a sneaky sleek and quick
(infiltrating) device, allowing you to quickly disguise your identity
and then quickly become inconspicuous. This change allows it to execute
that purpose better.
## Changelog
🆑 grungussuss
balance: MODsuits now deploy 2 times faster
balance: The infiltrator MODsuit now deploys 4 times faster
/🆑

code/modules/mod/mod_theme.dm

@@ -1351,6 +1351,7 @@
 	siemens_coefficient = 0
 	slowdown_inactive = 0
 	slowdown_active = 0
+	activation_step_time = MOD_ACTIVATION_STEP_TIME * 0.5
 	ui_theme = "syndicate"
 	slot_flags = ITEM_SLOT_BELT
 	inbuilt_modules = list(/obj/item/mod/module/infiltrator, /obj/item/mod/module/storage/belt, /obj/item/mod/module/demoralizer)