[IR][tests] Add tests for removal-of-abstract-fun IR linkage case

^KT-50771

compiler/testData/klibABI/removeAbstractFunctionFromAbstractClass/lib1/l1.kt.0

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+package lib1
+
+abstract class A {
+    abstract fun foo(): Int
+}

compiler/testData/klibABI/removeAbstractFunctionFromAbstractClass/lib1/l1.kt.1

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+package lib1
+
+open class A

compiler/testData/klibABI/removeAbstractFunctionFromAbstractClass/lib1/module.info

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+STEP 0:
+    dependencies: stdlib
+    modifications:
+        U : l1.kt.0 -> l1.kt
+STEP 1:
+    dependencies: stdlib
+    modifications:
+        U : l1.kt.1 -> l1.kt
+STEP 2:
+    dependencies: stdlib
+    modifications:
+        U : l1.kt.0 -> l1.kt

compiler/testData/klibABI/removeAbstractFunctionFromAbstractClass/lib2/l2.kt

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+package lib2
+
+import lib1.A
+
+class B : A() {
+    override fun foo() = 42
+}

compiler/testData/klibABI/removeAbstractFunctionFromAbstractClass/lib2/l2.kt.1

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+package lib2
+
+import lib1.A
+
+class B : A()

compiler/testData/klibABI/removeAbstractFunctionFromAbstractClass/lib2/module.info

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+STEP 0:
+    dependencies: stdlib, lib1
+STEP 1:
+    dependencies: stdlib, lib1
+    modifications:
+        U : l2.kt.1 -> l2.kt

compiler/testData/klibABI/removeAbstractFunctionFromAbstractClass/main/m.kt

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+import lib1.A
+import lib2.B
+
+fun box(): String {
+    val a: A = B()
+
+    try {
+        val answer: Int = a.foo() // <-- should throw linkage error here
+        println(answer)
+    } catch (e: Throwable) {
+        if (e.isLinkageError("lib2.B.foo")) return "OK"
+    }
+
+    return "FAIL"
+}
+
+private fun Throwable.isLinkageError(symbolName: String): Boolean =
+    this::class.simpleName == "IrLinkageError"
+            && message == "Abstract function $symbolName is not implemented in non-abstract class ${symbolName.substringBeforeLast(".")}"

compiler/testData/klibABI/removeAbstractFunctionFromAbstractClass/main/module.info

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+STEP 0:
+    dependencies: stdlib, lib1, lib2

compiler/testData/klibABI/removeAbstractFunctionFromAbstractClass/project.info

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+MODULES: lib1, lib2, main
+
+STEP 0:
+    libs: lib1, lib2, main
+
+STEP 1:
+    libs: lib1, lib2
+
+STEP 2:
+    libs: lib1