Remove special casing test for Alpha and increase vitamin max/thresbr…

…each (#74101)

* Remove Alpha special casing

* Adjust vitamin requirement to break threshold

* Increase max vitamin dose of alpha

* Apply suggestions from code review

data/json/mutations/mutation_category.json

@@ -209,6 +209,7 @@
     "threshold_mut": "THRESH_ALPHA",
     "mutagen_message": "You feel… better.  Somehow.",
     "memorial_message": "Started representing.",
+    "threshold_min": 2800,
     "vitamin": "mutagen_alpha",
     "base_removal_chance": 20
   },

data/json/vitamin.json

@@ -186,9 +186,9 @@
     "name": { "str": "Alpha Primer" },
     "excess": "mutagen_alpha",
     "min": 0,
-    "max": 2500,
+    "max": 5000,
     "rate": "1 h",
-    "disease_excess": [ [ 100, 500 ], [ 501, 2199 ], [ 2200, 2500 ] ]
+    "disease_excess": [ [ 100, 500 ], [ 501, 2199 ], [ 2200, 5000 ] ]
   },
   {
     "id": "mutagen_batrachian",

tests/mutation_test.cpp

@@ -210,7 +210,6 @@ TEST_CASE( "Having_all_mutations_give_correct_highest_category", "[mutations][st
 // If a category breach power falls below 55, it suggests that category lacks enough pre-threshold mutations
 // to comfortably cross the Threshold
 //
-// Alpha threshold is intentionally meant to be harder to breach, so the permitted range is 35-60
 //
 // When creating or editing a category, remember that 55 is a limit, not suggestion
 // 65+ is the suggested range
@@ -239,14 +238,7 @@ TEST_CASE( "Having_all_pre-threshold_mutations_gives_a_sensible_threshold_breach
             dummy.give_all_mutations( cur_cat, false );
 
             const int breach_chance = dummy.mutation_category_level[cat_id];
-            if( cat_id == mutation_category_ALPHA ) {
-                THEN( "Alpha Threshold breach power is between 35 and 60" ) {
-                    INFO( "MUTATIONS: " << get_mutations_as_string( dummy ) );
-                    CHECK( breach_chance >= 35 );
-                    CHECK( breach_chance <= 60 );
-                }
-                continue;
-            } else if( cat_id == mutation_category_CHIMERA ) {
+            if( cat_id == mutation_category_CHIMERA ) {
                 THEN( "Chimera Threshold breach power is 100+" ) {
                     INFO( "MUTATIONS: " << get_mutations_as_string( dummy ) );
                     CHECK( breach_chance >= 100 );