Introduce PureReifiable annotation

It prevents reporting unsafe substitution warning on expressions
like 'arrayOf(arrayOf(""))'

compiler/testData/diagnostics/testsWithStdLib/pureReifiable.kt

@@ -0,0 +1,12 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+@Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+inline fun <reified @kotlin.internal.PureReifiable T> foo(x: T) {}
+
+fun test() {
+    foo<List<String>>(listOf(""))
+    foo(listOf(""))
+
+    foo<Array<String>>(arrayOf(""))
+    foo(arrayOf(""))
+}

compiler/testData/diagnostics/testsWithStdLib/pureReifiable.txt

@@ -0,0 +1,4 @@
+package
+
+@kotlin.Suppress(names = {"INVISIBLE_MEMBER", "INVISIBLE_REFERENCE"}) public inline fun </*0*/ reified @kotlin.internal.PureReifiable() T> foo(/*0*/ x: T): kotlin.Unit
+public fun test(): kotlin.Unit

compiler/testData/diagnostics/testsWithStdLib/pureReifiableArrayOperations.kt

@@ -0,0 +1,18 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+fun test() {
+    arrayOf<List<String>>(listOf(""))
+    arrayOf(listOf(""))
+
+    arrayOf<Array<String>>(arrayOf(""))
+    arrayOf(arrayOf(""))
+
+    arrayOfNulls<Array<String>>(1)
+
+    Array<Array<String>>(1) { arrayOf("") }
+    Array(1) { arrayOf("") }
+    Array(1) { arrayOf("") }
+
+    emptyArray<Array<String>>()
+    val x: Array<Array<String>> = emptyArray()
+}

compiler/testData/diagnostics/testsWithStdLib/pureReifiableArrayOperations.txt

@@ -0,0 +1,3 @@
+package
+
+public fun test(): kotlin.Unit