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/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -21506,6 +21506,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTest("compiler/testData/codegen/box/invokedynamic/sam/kt47510.kt");
             }
 
+            @TestMetadata("kt52040_severalProxyFunsInInit.kt")
+            public void testKt52040_severalProxyFunsInInit() throws Exception {
+                runTest("compiler/testData/codegen/box/invokedynamic/sam/kt52040_severalProxyFunsInInit.kt");
+            }
+
             @TestMetadata("nullabilityAssertions.kt")
             public void testNullabilityAssertions() throws Exception {
                 runTest("compiler/testData/codegen/box/invokedynamic/sam/nullabilityAssertions.kt");