JVM IR: sanitize indy lambda proxy names correctly

In case there are several proxy functions for indy lambdas in the same
container, its names are "...__proxy", "...__proxy-0", "...__proxy-1",
..., yet before this change, only the first one was sanitized. So if
it's happening inside a constructor, `<init>` was left unrenamed which
led to ClassFormatError.

 #KT-52040 Fixed

compiler/testData/codegen/bytecodeListing/sam/severalProxyFunsInInit.kt

@@ -0,0 +1,19 @@
+// FULL_JDK
+// JVM_TARGET: 1.8
+// FILE: J.java
+
+import java.util.function.*;
+
+public class J {
+    public static void f1(Supplier<Object> r) {}
+    public static void f2(Supplier<Object> r) {}
+}
+
+// FILE: test.kt
+
+class C private constructor() {
+    companion object {
+        fun x1() = J.f1(::C)
+        fun x2() = J.f2(::C)
+    }
+}