Made bullet creation modifier generics

Resources/BossPhases/testphase.tres

@@ -0,0 +1,27 @@
+[gd_resource type="Resource" script_class="BossPhase" load_steps=4 format=3 uid="uid://c2xhuinmhit15"]
+
+[ext_resource type="Script" path="res://Scripts/Resources/BossPhase.cs" id="1_cxesb"]
+[ext_resource type="Script" path="res://Scripts/AttackPatterns/SpiralPattern.cs" id="1_q8vp4"]
+
+[sub_resource type="Resource" id="Resource_8caj3"]
+script = ExtResource("1_q8vp4")
+bulletSpeed = 5.0
+bulletCount = 16
+rotationSpeed = 0.0
+_rotationOffset = 0.0
+duration = 5.0
+burstInterval = 0.5
+spread = 360.0
+owner = 2
+_damageType = 0
+_bulletDamage = 1.0
+_timeModifiers = Array[Resource]([null])
+_targetPlayer = false
+WaitForCompletion = true
+
+[resource]
+script = ExtResource("1_cxesb")
+PhaseName = "asdf"
+Threshold = 0
+PlayAnimation = false
+Patterns = Array[Object]([SubResource("Resource_8caj3")])