[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/extensions/kt819ExtensionProperties.fir.kt

@@ -0,0 +1,37 @@
+//KT-819 Redeclaration error for extension properties with the same name and different receivers
+// FULL_JDK
+
+import java.io.*
+
+val InputStream.buffered : BufferedInputStream
+    get() = if(this is BufferedInputStream) this else BufferedInputStream(this)
+
+val Reader.buffered : BufferedReader
+    get() = if(this is BufferedReader) this else BufferedReader(this)
+
+
+//more tests
+open class A() {
+    open fun String.foo() {}
+    open fun Int.foo() {}
+
+    open val String.foo: Int
+        get() = 0
+    open val Int.foo: Int
+        get() = 1
+}
+
+class B() : A() {
+    override fun String.foo() {}
+    override fun Int.foo() {}
+
+    override val String.foo: Int
+        get() = 0
+    override val Int.foo: Int
+        get() = 0
+
+    fun use(s: String) {
+        s.foo
+        s.foo()
+    }
+}