[PSI2FIR] add test on primary constructor without constructor keyword

^KT-64900

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/primaryConstructorWithoutConstructorKeyword.kt

@@ -0,0 +1,4 @@
+// IGNORE_TREE_ACCESS: KT-64900
+class Foo private () {
+
+}

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/primaryConstructorWithoutConstructorKeyword.lazyBodies.txt

@@ -0,0 +1,7 @@
+FILE: primaryConstructorWithoutConstructorKeyword.kt
+    public final? class Foo : R|kotlin/Any| {
+        private error_constructor(): R|Foo| {
+            LAZY_super<R|kotlin/Any|>
+        }
+
+    }

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/primaryConstructorWithoutConstructorKeyword.txt

@@ -0,0 +1,7 @@
+FILE: primaryConstructorWithoutConstructorKeyword.kt
+    public final? class Foo : R|kotlin/Any| {
+        private [ContainingClassKey=Foo] error_constructor(): R|Foo| {
+            super<R|kotlin/Any|>()
+        }
+
+    }