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)
+    }
+}

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

@@ -0,0 +1,58 @@
+@kotlin.Metadata
+synthetic final class C$Companion$x1$1 {
+    // source: 'test.kt'
+    enclosing method C$Companion.x1()V
+    public final static field INSTANCE: C$Companion$x1$1
+    inner (anonymous) class C$Companion$x1$1
+    static method <clinit>(): void
+    method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method invoke(): C
+    public synthetic bridge method invoke(): java.lang.Object
+    public final inner class C$Companion
+}
+
+@kotlin.Metadata
+synthetic final class C$Companion$x2$1 {
+    // source: 'test.kt'
+    enclosing method C$Companion.x2()V
+    public final static field INSTANCE: C$Companion$x2$1
+    inner (anonymous) class C$Companion$x2$1
+    static method <clinit>(): void
+    method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method invoke(): C
+    public synthetic bridge method invoke(): java.lang.Object
+    public final inner class C$Companion
+}
+
+@kotlin.Metadata
+public final class C$Companion {
+    // source: 'test.kt'
+    inner (anonymous) class C$Companion$x1$1
+    inner (anonymous) class C$Companion$x2$1
+    inner (anonymous) class C$sam$java_util_function_Supplier$0
+    private method <init>(): void
+    public synthetic method <init>(p0: kotlin.jvm.internal.DefaultConstructorMarker): void
+    public final method x1(): void
+    public final method x2(): void
+    public final inner class C$Companion
+}
+
+@kotlin.Metadata
+synthetic final class C$sam$java_util_function_Supplier$0 {
+    // source: 'test.kt'
+    enclosing method C$Companion.x1()V
+    private synthetic final field function: kotlin.jvm.functions.Function0
+    inner (anonymous) class C$sam$java_util_function_Supplier$0
+    method <init>(p0: kotlin.jvm.functions.Function0): void
+    public synthetic final method get(): java.lang.Object
+}
+
+@kotlin.Metadata
+public final class C {
+    // source: 'test.kt'
+    public final static @org.jetbrains.annotations.NotNull field Companion: C$Companion
+    static method <clinit>(): void
+    private method <init>(): void
+    public synthetic method <init>(p0: kotlin.jvm.internal.DefaultConstructorMarker): void
+    public final inner class C$Companion
+}

compiler/testData/codegen/bytecodeListing/sam/severalProxyFunsInInit_ir.txt

@@ -0,0 +1,21 @@
+@kotlin.Metadata
+public final class C$Companion {
+    // source: 'test.kt'
+    private method <init>(): void
+    public synthetic method <init>(p0: kotlin.jvm.internal.DefaultConstructorMarker): void
+    private synthetic final static method x1$_init___proxy(): C
+    public final method x1(): void
+    private synthetic final static method x2$_init___proxy-0(): C
+    public final method x2(): void
+    public final inner class C$Companion
+}
+
+@kotlin.Metadata
+public final class C {
+    // source: 'test.kt'
+    public final static @org.jetbrains.annotations.NotNull field Companion: C$Companion
+    static method <clinit>(): void
+    private method <init>(): void
+    public synthetic method <init>(p0: kotlin.jvm.internal.DefaultConstructorMarker): void
+    public final inner class C$Companion
+}