K2: Add KtDiagnosticRenderers.CLASS_ID to render ClassId FQNs with dots

KT-MR-13391

compiler/fir/analysis-tests/testData/resolveWithStdlib/ClassIdDiagnosticRendering.fir.txt

@@ -0,0 +1,47 @@
+FILE: ClassIdDiagnosticRendering.kt
+    package a.b.c
+
+    @R|kotlin/RequiresOptIn|() public final annotation class Marker : R|kotlin/Annotation| {
+        public constructor(): R|a/b/c/Marker| {
+            super<R|kotlin/Any|>()
+        }
+
+    }
+    @R|a/b/c/Marker|() public final class Some : R|kotlin/Any| {
+        public constructor(): R|a/b/c/Some| {
+            super<R|kotlin/Any|>()
+        }
+
+    }
+    public final fun main(): R|kotlin/Unit| {
+        R|a/b/c/Some.Some|()
+    }
+    public final annotation class DummyAnnotation : R|kotlin/Annotation| {
+        public constructor(): R|a/b/c/DummyAnnotation| {
+            super<R|kotlin/Any|>()
+        }
+
+    }
+    @R|kotlin/SubclassOptInRequired|(markerClass = <getClass>(Q|a/b/c/DummyAnnotation|)) public open class IncorrectSubclassOptInArgumentMarker : R|kotlin/Any| {
+        public constructor(): R|a/b/c/IncorrectSubclassOptInArgumentMarker| {
+            super<R|kotlin/Any|>()
+        }
+
+    }
+    internal abstract fun interface StableInterface : R|kotlin/Any| {
+        @R|a/b/c/Marker|() public abstract fun experimentalMethod(): R|kotlin/Unit|
+
+    }
+    public final fun testOverrides(): R|kotlin/Unit| {
+        object : R|a/b/c/StableInterface| {
+            private constructor(): R|a/b/c/<anonymous>| {
+                super<R|kotlin/Any|>()
+            }
+
+            public open override fun experimentalMethod(): R|kotlin/Unit| {
+            }
+
+        }
+
+    }
+    public final actual typealias TypealiasToKotlinPkg = R|kotlin/Deprecated|

compiler/fir/analysis-tests/testData/resolveWithStdlib/ClassIdDiagnosticRendering.kt

@@ -0,0 +1,33 @@
+// WITH_EXTENDED_CHECKERS
+
+package a.b.c
+
+import <!PLATFORM_CLASS_MAPPED_TO_KOTLIN("kotlin.jvm.functions.Function0")!>kotlin.jvm.functions.Function0<!>
+
+@RequiresOptIn
+annotation class Marker
+
+@Marker
+class Some
+
+fun main() {
+    <!OPT_IN_USAGE_ERROR("a.b.c.Marker; This declaration needs opt-in. Its usage must be marked with '@a.b.c.Marker' or '@OptIn(a.b.c.Marker::class)'")!>Some<!>()
+}
+
+annotation class DummyAnnotation
+
+<!OPT_IN_ARGUMENT_IS_NOT_MARKER("a.b.c.DummyAnnotation")!>@SubclassOptInRequired(DummyAnnotation::class)<!>
+open class IncorrectSubclassOptInArgumentMarker
+
+internal fun interface StableInterface {
+    @Marker
+    fun experimentalMethod()
+}
+
+fun testOverrides() {
+    object : StableInterface {
+        override fun <!OPT_IN_OVERRIDE_ERROR("a.b.c.Marker; Base declaration of supertype 'StableInterface' needs opt-in. The declaration override must be annotated with '@a.b.c.Marker' or '@OptIn(a.b.c.Marker::class)'")!>experimentalMethod<!>() {}
+    }
+}
+
+<!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> typealias TypealiasToKotlinPkg = <!ACTUAL_TYPEALIAS_TO_SPECIAL_ANNOTATION("kotlin.Deprecated")!>kotlin.Deprecated<!>