Medical research nodes adjustment (#84783)

## About The Pull Request
Moves XL beaker from Chemical Synthesis to Medbay Equipment
Removes Plumbing node and moves most items to Chemical synthesis node
Moves piercing syringe from Plumbing node to Advanced Medbay Equipment


![346569359-1dfa219c-85eb-4842-a47c-a1556c3dea61](https://github.com/tgstation/tgstation/assets/109347230/e4dc5ddc-8b1c-4782-ad91-12177d8cd6c1)

## Why It's Good For The Game
Love the science rework, there's just a few things that need to be moved
around.

I've got two reasons for ya.
Bluespace beakers are often researched before metamaterial beakers due
to the different node paths and the value of bluespace research being
greater than plumbing research. It's a little weird that the higher
volume beaker is so often available sooner
XL-beakers are pretty simple and are already locked behind plastic, they
should probably be available to chemists at round start, just like they
were before the research rework.

## Changelog
🆑
balance: Moves XL beaker from Chemical Synthesis to Medbay Equipment
balance: Removes Plumbing node and moves most items to Chemical
synthesis node
balance: Moves piercing syringe from Plumbing node to Advanced Medbay
Equipment
/🆑

code/modules/research/techweb/nodes/medbay_nodes.dm

@@ -28,6 +28,7 @@
 		"syringe",
 		"dropper",
 		"pillbottle",
+		"xlarge_beaker",
 	)
 	experiments_to_unlock = list(
 		/datum/experiment/autopsy/human,
@@ -43,7 +44,6 @@
 	description = "Synthesizing complex chemicals from electricity and thin air... Don't ask how..."
 	prereq_ids = list(TECHWEB_NODE_MEDBAY_EQUIP)
 	design_ids = list(
-		"xlarge_beaker",
 		"med_spray_bottle",
 		"medigel",
 		"medipen_refiller",
@@ -53,29 +53,19 @@
 		"portable_chem_mixer",
 		"chem_heater",
 		"w-recycler",
-	)
-	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = TECHWEB_TIER_1_POINTS)
-
-/datum/techweb_node/plumbing
-	id = TECHWEB_NODE_PLUMBING
-	display_name = "Plumbing"
-	description = "Essential infrastructure for building chemical factories. To scale up the production of happy pills to an industrial level."
-	prereq_ids = list(TECHWEB_NODE_CHEM_SYNTHESIS)
-	design_ids = list(
+		"meta_beaker",
 		"plumbing_rcd",
 		"plumbing_rcd_service",
 		"plunger",
 		"fluid_ducts",
-		"meta_beaker",
-		"piercesyringe",
 	)
-	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = TECHWEB_TIER_2_POINTS)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = TECHWEB_TIER_1_POINTS)
 
 /datum/techweb_node/medbay_equip_adv
 	id = TECHWEB_NODE_MEDBAY_EQUIP_ADV
 	display_name = "Advanced Medbay Equipment"
 	description = "State-of-the-art medical gear for keeping the crew in one piece — mostly."
-	prereq_ids = list(TECHWEB_NODE_PLUMBING)
+	prereq_ids = list(TECHWEB_NODE_CHEM_SYNTHESIS)
 	design_ids = list(
 		"smoke_machine",
 		"chem_mass_spec",
@@ -85,6 +75,7 @@
 		"defibrillator_compact",
 		"defibmount",
 		"medicalbed_emergency",
+		"piercesyringe",
 	)
 	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = TECHWEB_TIER_3_POINTS)
 	required_experiments = list(/datum/experiment/scanning/reagent/haloperidol)