[IR] Don't use the GET_PROPERTY origin on IrGetField expressions.

This origin was set somewhat arbitrarily.
It actually only makes sense for `IrCall`s to property getters.
There were no places in lowerings that checked `IrGetField` expressions
for this origin value.

^KT-62500 Fixed

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/generators/CallGenerator.kt

@@ -214,8 +214,7 @@ internal class CallGenerator(statementGenerator: StatementGenerator) : Statement
                     fieldSymbol,
                     irType,
                     dispatchReceiverValue?.load() ?: extensionReceiverValue?.load(),
-                    IrStatementOrigin.GET_PROPERTY,
-                    superQualifierSymbol
+                    superQualifierSymbol = superQualifierSymbol
                 ).also { context.callToSubstitutedDescriptorMap[it] = descriptor }
             }
         } else {

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/IrStatementOrigin.kt

@@ -75,7 +75,11 @@ interface IrStatementOrigin {
         val ARGUMENTS_REORDERING_FOR_CALL by IrStatementOriginImpl
         val DESTRUCTURING_DECLARATION by IrStatementOriginImpl
 
+        /**
+         * Used on an [IrCall] expression to indicate that it's a call to a property getter.
+         */
         val GET_PROPERTY by IrStatementOriginImpl
+
         val GET_LOCAL_PROPERTY by IrStatementOriginImpl
 
         val IF by IrStatementOriginImpl