K2: Add new tests for PCLA implementation

Many of them have been found & minimized at FP tests/user projects

^KT-59791 Fixed

compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt38667Simplified.kt

@@ -0,0 +1,22 @@
+// FIR_IDENTICAL
+// ISSUE: KT-38667
+
+interface PropKey<T1>
+abstract class AnimationBuilder<T2>
+class TransitionSpec<S> {
+    fun <E> tween(init: AnimationBuilder<E>.() -> Unit): AnimationBuilder<E> = TODO()
+    fun <F> PropKey<F>.using(builder: AnimationBuilder<F>) {}
+}
+class TransitionDefinition<X> {
+    fun transition(fromState: X, init: TransitionSpec<X>.() -> Unit) {}
+}
+
+fun <T3> transitionDefinition(init: TransitionDefinition<T3>.() -> Unit) {}
+
+fun main(intProp: PropKey<Int>, w: Int) {
+    transitionDefinition {
+        transition(w) {
+            intProp.using(tween {})
+        }
+    }
+}