K2: Fix priority for implicit receiver + extensionInvoke

See K1 counterpart at org.jetbrains.kotlin.resolve.calls.tower.TowerResolver.Task.processImplicitReceiver

^KT-58943 Fixed
^KT-59541 Fixed

compiler/fir/analysis-tests/testData/resolveWithStdlib/problems/invokePriority.kt

@@ -4,7 +4,7 @@ class A {
         fun String.foo(): Unit {} // (2)
         "1".foo() // resolves to (2)
         with("2") {
-            foo() // BUG: resolves to (1) in old FE, but to (2) in FIR
+            foo() // resolves to (1)
         }
     }
 }