JVM IR: generate enclosing constructor only for lambdas in initializers

There was a typo in JvmLocalClassPopupLowering which allowed the
EnclosingMethod for lambdas and anonymous classes in initializers to
become any function in a class, in case when there was no primary
constructor in that class. E.g. in the added test, `getIrrelevantField`
was the EnclosingMethod of the lambda class before this change.

compiler/testData/codegen/bytecodeListing/inline/enclosingInfo/lambdaInInitBlockNoPrimaryConstructor.kt

@@ -0,0 +1,15 @@
+interface A
+interface B
+
+class E {
+    val irrelevantField = 1
+
+    init {
+        // This test checks that EnclosingMethod (named "outer class" in ASM for some reason) of this lambda class contains
+        // something sensible. Currently, we use one of the constructors (not important which).
+        val lambda = {}
+    }
+
+    constructor(a: A)
+    constructor(b: B)
+}

compiler/testData/codegen/bytecodeListing/inline/enclosingInfo/lambdaInInitBlockNoPrimaryConstructor.txt

@@ -0,0 +1,31 @@
+@kotlin.Metadata
+public interface A {
+    // source: 'lambdaInInitBlockNoPrimaryConstructor.kt'
+}
+
+@kotlin.Metadata
+public interface B {
+    // source: 'lambdaInInitBlockNoPrimaryConstructor.kt'
+}
+
+@kotlin.Metadata
+final class E$lambda$1 {
+    // source: 'lambdaInInitBlockNoPrimaryConstructor.kt'
+    enclosing method E.<init>(LB;)V
+    public final static field INSTANCE: E$lambda$1
+    inner (anonymous) class E$lambda$1
+    static method <clinit>(): void
+    method <init>(): void
+    public synthetic bridge method invoke(): java.lang.Object
+    public final method invoke(): void
+}
+
+@kotlin.Metadata
+public final class E {
+    // source: 'lambdaInInitBlockNoPrimaryConstructor.kt'
+    private final field irrelevantField: int
+    inner (anonymous) class E$lambda$1
+    public method <init>(@org.jetbrains.annotations.NotNull p0: A): void
+    public method <init>(@org.jetbrains.annotations.NotNull p0: B): void
+    public final method getIrrelevantField(): int
+}

compiler/testData/codegen/bytecodeListing/inline/enclosingInfo/lambdaInInitBlockNoPrimaryConstructor_ir.txt

@@ -0,0 +1,31 @@
+@kotlin.Metadata
+public interface A {
+    // source: 'lambdaInInitBlockNoPrimaryConstructor.kt'
+}
+
+@kotlin.Metadata
+public interface B {
+    // source: 'lambdaInInitBlockNoPrimaryConstructor.kt'
+}
+
+@kotlin.Metadata
+final class E$lambda$1 {
+    // source: 'lambdaInInitBlockNoPrimaryConstructor.kt'
+    enclosing method E.<init>(LA;)V
+    public final static field INSTANCE: E$lambda$1
+    inner (anonymous) class E$lambda$1
+    static method <clinit>(): void
+    method <init>(): void
+    public synthetic bridge method invoke(): java.lang.Object
+    public final method invoke(): void
+}
+
+@kotlin.Metadata
+public final class E {
+    // source: 'lambdaInInitBlockNoPrimaryConstructor.kt'
+    private final field irrelevantField: int
+    inner (anonymous) class E$lambda$1
+    public method <init>(@org.jetbrains.annotations.NotNull p0: A): void
+    public method <init>(@org.jetbrains.annotations.NotNull p0: B): void
+    public final method getIrrelevantField(): int
+}