Use camel-case in FirFunctionCallOrigin

Also componentCall is operator call

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/BuilderConfigurator.kt

@@ -179,7 +179,7 @@ object BuilderConfigurator : AbstractBuilderConfigurator<FirTreeBuilder>(FirTree
         builder(functionCall) {
             configurationForFunctionCallBuilder()
             default("origin") {
-                value = "FirFunctionCallOrigin.REGULAR"
+                value = "FirFunctionCallOrigin.Regular"
             }
         }
         builder(implicitInvokeCall, init = configurationForFunctionCallBuilder)

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/ImplementationConfigurator.kt

@@ -154,11 +154,11 @@ object ImplementationConfigurator : AbstractFirTreeImplementationConfigurator()
         }
 
         impl(implicitInvokeCall) {
-            default("origin", "FirFunctionCallOrigin.OPERATOR")
+            default("origin", "FirFunctionCallOrigin.Operator")
         }
 
         impl(componentCall) {
-            default("origin", "FirFunctionCallOrigin.REGULAR")
+            default("origin", "FirFunctionCallOrigin.Operator")
         }
 
         impl(qualifiedAccessExpression)