Makes Metastation Pharmacy and Chemistry more consistent with other maps. (#81788)

## About The Pull Request
Makes the pharma airlocks not use general medical access, Also changes
the Chemistry and Pharma airlocks to medical airlocks so they're more
consistent with other maps

## Why It's Good For The Game

Pharma shouldn't be accessible with general medical access (Medical
Security Officers, HoS and Paramedics) also the airlocks being more
consistent with other maps is nice

## Changelog
🆑

fix: MetaStation Pharmacy is no longer accessible with general medical
access, Also changes the Chemistry and Pharmacy airlocks into medical
ones.

/🆑

_maps/map_files/MetaStation/MetaStation.dmm

@@ -43180,8 +43180,8 @@
 	},
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
-/obj/machinery/door/airlock/research/glass{
-	name = "Chemistry Lab"
+/obj/machinery/door/airlock/medical/glass{
+	name = "Chemistry"
 	},
 /obj/effect/mapping_helpers/airlock/access/all/medical/chemistry,
 /obj/machinery/door/firedoor,
@@ -45173,7 +45173,6 @@
 	},
 /obj/structure/cable,
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
-/obj/effect/mapping_helpers/airlock/access/any/medical/general,
 /obj/effect/mapping_helpers/airlock/access/any/medical/pharmacy,
 /turf/open/floor/plating,
 /area/station/maintenance/department/medical/central)
@@ -62655,13 +62654,12 @@
 "whx" = (
 /obj/machinery/door/firedoor,
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
-/obj/machinery/door/airlock/research/glass{
+/obj/machinery/door/airlock/medical/glass{
 	name = "Pharmacy"
 	},
 /obj/structure/disposalpipe/segment{
 	dir = 4
 	},
-/obj/effect/mapping_helpers/airlock/access/any/medical/general,
 /obj/effect/mapping_helpers/airlock/access/any/medical/pharmacy,
 /obj/effect/turf_decal/tile/yellow/fourcorners,
 /obj/effect/landmark/navigate_destination,