Add tests for obsolete issues

#KT-38804 Obsolete
 #KT-38801 Obsolete
 #KT-38835 Obsolete
 #KT-38737 Obsolete
 #KT-38664 Obsolete
 #KT-38549 Obsolete
 #KT-38766 Obsolete
 #KT-38714 Obsolete

compiler/testData/diagnostics/testsWithStdLib/inference/kt38737.fir.kt

@@ -0,0 +1,13 @@
+private const val dateRangeStart: String = "2020-01-01"
+private const val dateRangeEnd: String = "2020-05-01"
+
+private fun String?.toIconList(): List<String> = when (this) {
+    null -> listOf("DATE_IS_NULL")
+    <!INAPPLICABLE_CANDIDATE!>in<!> dateRangeStart..dateRangeEnd -> emptyList()
+    else -> listOf("DATE_IS_OUT_OF_RANGE")
+}
+
+fun main() {
+    println("2019-12-31".toIconList())
+    println(null.toIconList())
+}

compiler/testData/diagnostics/testsWithStdLib/inference/kt38737.kt

@@ -0,0 +1,13 @@
+private const val dateRangeStart: String = "2020-01-01"
+private const val dateRangeEnd: String = "2020-05-01"
+
+private fun String?.toIconList(): List<String> = when (this) {
+    null -> listOf("DATE_IS_NULL")
+    in dateRangeStart..dateRangeEnd -> emptyList()
+    else -> listOf("DATE_IS_OUT_OF_RANGE")
+}
+
+fun main() {
+    println("2019-12-31".toIconList())
+    println(null.toIconList())
+}

compiler/testData/diagnostics/testsWithStdLib/inference/kt38737.txt

@@ -0,0 +1,6 @@
+package
+
+private const val dateRangeEnd: kotlin.String = "2020-05-01"
+private const val dateRangeStart: kotlin.String = "2020-01-01"
+public fun main(): kotlin.Unit
+private fun kotlin.String?.toIconList(): kotlin.collections.List<kotlin.String>

compiler/testData/diagnostics/testsWithStdLib/inference/kt38801.kt

@@ -0,0 +1,17 @@
+// FIR_IDENTICAL
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+open class A {
+    open val servers: List<C>
+        get() = findAndExpand({ "hi" })
+            .mapNotNull { B.foo(it) }
+
+    fun findAndExpand(vararg path: () -> String): List<String> = TODO()
+}
+
+object B {
+    inline fun <reified T : C> foo(bar: String?): T? = TODO()
+}
+
+open class C
+class D : C()

compiler/testData/diagnostics/testsWithStdLib/inference/kt38801.txt

@@ -0,0 +1,32 @@
+package
+
+public open class A {
+    public constructor A()
+    public open val servers: kotlin.collections.List<C>
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun findAndExpand(/*0*/ vararg path: () -> kotlin.String /*kotlin.Array<out () -> kotlin.String>*/): kotlin.collections.List<kotlin.String>
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public object B {
+    private constructor B()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final inline fun </*0*/ reified T : C> foo(/*0*/ bar: kotlin.String?): T?
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public open class C {
+    public constructor C()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class D : C {
+    public constructor D()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}