Property <-> Function Conversion: Add/remove 'get'/'is' prefixes automatically

#KT-8812 Fixed

idea/testData/intentions/convertFunctionToProperty/otherRefsIs.kt

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+package p
+
+import p.isFoo
+
+class A(val n: Int)
+
+fun A.<caret>isFoo(): Boolean = n > 1
+
+fun test() {
+    val t = A::isFoo
+}