[FIR] Implement FirReturnAllowedChecker

Supported diagnostics:
- RETURN_NOT_ALLOWED
- RETURN_IN_FUNCTION_WITH_EXPRESSION_BODY

compiler/testData/diagnostics/testsWithStdLib/factoryPattern/returnFromInlineLambda.fir.kt

@@ -1,51 +0,0 @@
-// !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
-// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION -EXPERIMENTAL_API_USAGE -EXPERIMENTAL_UNSIGNED_LITERALS
-// ISSUE: KT-11265
-
-// FILE: OverloadResolutionByLambdaReturnType.kt
-
-package kotlin
-
-annotation class OverloadResolutionByLambdaReturnType
-
-// FILE: main.kt
-
-import kotlin.OverloadResolutionByLambdaReturnType
-
-inline fun <T, R> Array<out T>.myFlatMap(transform: (T) -> Iterable<R>): List<R> {
-    TODO()
-}
-
-@OverloadResolutionByLambdaReturnType
-@JvmName("seqFlatMap")
-inline fun <T, R> Array<out T>.myFlatMap(transform: (T) -> Sequence<R>): List<R> {
-    TODO()
-}
-
-fun String.toList(): List<String> = null!!
-
-fun test_1(a: Array<String>, b: Boolean) {
-    a.myFlatMap { it.toList().ifEmpty { return } }
-    a.myFlatMap {
-        if (b) return
-        it.toList()
-    }
-}
-
-fun <T, R> Array<out T>.noInlineFlatMap(transform: (T) -> Iterable<R>): List<R> {
-    TODO()
-}
-
-@OverloadResolutionByLambdaReturnType
-@JvmName("noInlineSeqFlatMap")
-fun <T, R> Array<out T>.noInlineFlatMap(transform: (T) -> Sequence<R>): List<R> {
-    TODO()
-}
-
-fun test_2(a: Array<String>, b: Boolean) {
-    a.noInlineFlatMap { it.toList().ifEmpty { return } }
-    a.noInlineFlatMap {
-        if (b) return
-        it.toList()
-    }
-}

compiler/testData/diagnostics/testsWithStdLib/factoryPattern/returnFromInlineLambda.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION -EXPERIMENTAL_API_USAGE -EXPERIMENTAL_UNSIGNED_LITERALS
 // ISSUE: KT-11265