FIR: Fix SAM conversion for raw types with non-trivial TP upper bounds

compiler/fir/analysis-tests/testData/resolve/rawTypeSam.kt

@@ -0,0 +1,17 @@
+// FILE: main.kt
+
+fun foo() {
+    RawType.bar {
+        it.length > 0
+    }
+}
+
+// FILE: Processor.java
+public interface Processor<T extends CharSequence> {
+    boolean process(T t);
+}
+
+// FILE: RawType.java
+public class RawType {
+    public static void bar(Processor x) {}
+}

compiler/fir/analysis-tests/testData/resolve/rawTypeSam.txt

@@ -0,0 +1,7 @@
+FILE: main.kt
+    public final fun foo(): R|kotlin/Unit| {
+        Q|RawType|.R|/RawType.bar|(<L> = bar@fun <anonymous>(it: R|ft<kotlin/CharSequence, kotlin/CharSequence?>!|): R|kotlin/Boolean| {
+            ^ CMP(>, R|<local>/it|.R|kotlin/CharSequence.length|.R|kotlin/Int.compareTo|(Int(0)))
+        }
+        )
+    }