Psi2ir: fix parameter indices when generating extension invoke call

Incorrect `valueParameter` was passed to `generateValueArgument`, which
resulted in incorrect type being considered for generating suspend
conversion.

 #KT-50949 Fixed

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -46301,6 +46301,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             runTest("compiler/testData/codegen/box/suspendConversion/chainedFunSuspendConversionForSimpleExpression.kt");
         }
 
+        @Test
+        @TestMetadata("kt50949_suspendConversionForExtensionFunction.kt")
+        public void testKt50949_suspendConversionForExtensionFunction() throws Exception {
+            runTest("compiler/testData/codegen/box/suspendConversion/kt50949_suspendConversionForExtensionFunction.kt");
+        }
+
         @Test
         @TestMetadata("overloadResolutionBySuspendModifier.kt")
         public void testOverloadResolutionBySuspendModifier() throws Exception {

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/ir/Fir2IrTextTestGenerated.java

@@ -1892,6 +1892,12 @@ public class Fir2IrTextTestGenerated extends AbstractFir2IrTextTest {
             runTest("compiler/testData/ir/irText/expressions/stringTemplates.kt");
         }
 
+        @Test
+        @TestMetadata("suspendConversionForExtensionFunction.kt")
+        public void testSuspendConversionForExtensionFunction() throws Exception {
+            runTest("compiler/testData/ir/irText/expressions/suspendConversionForExtensionFunction.kt");
+        }
+
         @Test
         @TestMetadata("suspendConversionInVararg.kt")
         public void testSuspendConversionInVararg() throws Exception {