RespiratorSystem Cleanup (#38572)

* Respirator Debodied

* Forgot about alerts (also respirator testa and events)

* Fix Urist eating air and not giving it back

* Stop nuke ops from taking in a breath then taking in a second breath causing them to get a headache from carbon dioxide poisoning and failing TryStopNukeOpsFromConstantlyFailing();

* Consts are smelly,

* Actually we don't need to raise the entity, just the component

* Don't forget to remove the unused code today, said me yesterday

* Remove all fallbacks

* Debody that too

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Co-authored-by: Princess Cheeseballs <66055347+Pronana@users.noreply.github.com>

Content.Server/Body/Systems/LungSystem.cs

@@ -63,6 +63,9 @@ public sealed class LungSystem : EntitySystem
         _solutionContainerSystem.UpdateChemicals(lung.Solution.Value);
     }
 
+    /* This should really be moved to somewhere in the atmos system and modernized,
+     so that other systems, like CondenserSystem, can use it.
+     */
     private void GasToReagent(GasMixture gas, Solution solution)
     {
         foreach (var gasId in Enum.GetValues<Gas>())