Tonguespike buff, chemspike slight nerf (tgstation#75092)

Increases the tonguespike damage.
impact damage: 15 -> 25
pain damage (leaving tonguespike embedded damage): 4 -> 15
cooldown time = 10 seconds -> 1 seconds

Decreases the chemspike damage
impact damage: 4? -> 2
pain damage: 4 -> 0

These values were eyeballed when I originally added them, fuck embedding
code, uuuh... these values make more sense. At the very least
tonguespike was nearly unusuable being a 15 damage item that pain-ticked
for a pitiful 4.
The cooldown was just unnecessary and killed unnecessary organ
regeneration strategies

Chemspike ticked for too much when it wasn't really meant to deal much
damage.

code/datums/mutations/tongue_spike.dm

@@ -15,7 +15,7 @@
  button_icon = 'icons/mob/actions/actions_genetic.dmi'
  button_icon_state = "spike"
 
- cooldown_time = 10 SECONDS
+ cooldown_time = 1 SECONDS
  spell_requirements = SPELL_REQUIRES_HUMAN
 
  /// The type-path to what projectile we spawn to throw at someone.
@@ -46,10 +46,11 @@
  icon = 'icons/obj/weapons/thrown.dmi'
  icon_state = "tonguespike"
  force = 2
- throwforce = 15 //15 + 2 (WEIGHT_CLASS_SMALL) * 4 (EMBEDDED_IMPACT_PAIN_MULTIPLIER) = i didnt do the math
+ throwforce = 25
  throw_speed = 4
  embedding = list(
- "embedded_pain_multiplier" = 4,
+ "impact_pain_mult" = 0,
+ "embedded_pain_multiplier" = 15,
  "embed_chance" = 100,
  "embedded_fall_chance" = 0,
  "embedded_ignore_throwspeed_threshold" = TRUE,
@@ -107,8 +108,9 @@
  name = "chem spike"
  desc = "Hardened biomass, shaped into... something."
  icon_state = "tonguespikechem"
- throwforce = 2 //2 + 2 (WEIGHT_CLASS_SMALL) * 0 (EMBEDDED_IMPACT_PAIN_MULTIPLIER) = i didnt do the math again but very low or smthin
+ throwforce = 2
  embedding = list(
+ "impact_pain_mult" = 0,
  "embedded_pain_multiplier" = 0,
  "embed_chance" = 100,
  "embedded_fall_chance" = 0,