Fix synthetic method generation for extension properties

If several annotated extension properties with the same name were declared in
one class, JVM issued a ClassFormatError, since we generated a synthetic method
for each of them with the same name and signature. Make the signature of this
synthetic method depend on a receiver parameter, if a property has one

compiler/testData/loadKotlin/annotations/packageMembers/ExtensionPropertiesWithSameNameNoField.kt

@@ -0,0 +1,14 @@
+package test
+
+annotation class IntAnno
+annotation class StringAnno
+annotation class DoubleAnno
+
+[IntAnno] val Int.extension: Int
+    get() = this
+
+[StringAnno] val String.extension: String
+    get() = this
+
+[DoubleAnno] val Double.extension: Int
+    get() = 42

compiler/testData/loadKotlin/annotations/packageMembers/ExtensionPropertiesWithSameNameNoField.txt

@@ -0,0 +1,20 @@
+package test
+
+test.DoubleAnno() internal val jet.Double.extension: jet.Int
+    internal fun jet.Double.<get-extension>(): jet.Int
+test.IntAnno() internal val jet.Int.extension: jet.Int
+    internal fun jet.Int.<get-extension>(): jet.Int
+test.StringAnno() internal val jet.String.extension: jet.String
+    internal fun jet.String.<get-extension>(): jet.String
+
+internal final annotation class DoubleAnno : jet.Annotation {
+    /*primary*/ public constructor DoubleAnno()
+}
+
+internal final annotation class IntAnno : jet.Annotation {
+    /*primary*/ public constructor IntAnno()
+}
+
+internal final annotation class StringAnno : jet.Annotation {
+    /*primary*/ public constructor StringAnno()
+}