Add compiler X-flag to enable self upper bound type inference

^KT-48026 Fixed

compiler/testData/cli/jvm/selfUpperBoundInference.kt

@@ -0,0 +1,51 @@
+class Builder<B : Builder<B>> {
+    fun <T : B> test(): T = TODO()
+
+    fun foo() {}
+}
+
+fun testStar(builder: Builder<*>) {
+    builder.test()
+
+    builder
+        .test()
+        .foo()
+}
+
+fun <K : Builder<K>> testTypeParam(builder: Builder<K>) {
+    builder.test()
+
+    builder
+        .test()
+        .foo()
+}
+
+interface BodySpec<B, S : BodySpec<B, S>> {
+    fun <T : S> isEqualTo(expected: B): T
+}
+
+fun test(b: BodySpec<String, *>) {
+    b.isEqualTo("")
+
+    WriterAppender.newBuilder()
+    WriterAppender.Builder1()
+    WriterAppender.intersectTwoSelfTypes()
+}
+
+object WriterAppender {
+    interface Builder2<K : Builder2<K>>
+
+    class Builder1<B : Builder1<B>> {
+        fun asBuilder(): B {
+            return this as B
+        }
+    }
+
+    fun <B : Builder1<B>> newBuilder(): B {
+        return Builder1<B>().asBuilder()
+    }
+
+    fun <B> intersectTwoSelfTypes(): B where B : Builder1<B>, B: Builder2<B> {
+        return Builder1<B>().asBuilder()
+    }
+}