[FIR] Support completion of lambdas with type variable as expected type

#KT-37310 Fixed
#KT-37304 Fixed

compiler/testData/diagnostics/tests/inference/constraints/returnLambdaFromLambda.fir.kt

@@ -6,7 +6,7 @@ fun testLambda() {
         if (x is String) return@myRun { it -> x.length <!AMBIGUITY!>+<!> it }
         if (x !is Int) return@myRun { it -> it }
 
-        { it -> x <!AMBIGUITY!>+<!> it }
+        { it -> x + it }
     }
 
     val twoLambda: (Int) -> Int = myRun {

compiler/testData/diagnostics/tests/inference/kt3184.fir.kt

@@ -1,26 +0,0 @@
-//KT-3184 Type inference seems partially broken
-package a
-
-import java.util.HashMap
-
-private fun <T> test(value: T, extf: String.(value: T)->Unit) {
-    "".extf(value)
-}
-
-fun main() {
-    test(1, {value -> println(value)})
-}
-
-fun tests() {
-    val dict = HashMap<String, (String) -> Unit>()
-    <!INAPPLICABLE_CANDIDATE!>dict["0"] = { str -> println(str) }<!>
-    <!INAPPLICABLE_CANDIDATE!>dict["1"] = { println(<!UNRESOLVED_REFERENCE!>it<!>) }<!>
-
-    dict.<!INAPPLICABLE_CANDIDATE!>set<!>("1", { println(<!UNRESOLVED_REFERENCE!>it<!>) })
-    <!INAPPLICABLE_CANDIDATE!>dict["1"] = { r -> println(r) }<!>
-}
-
-// from standard library
-operator fun <K, V> MutableMap<K, V>.set(key : K, value : V) : V? = this.put(key, value)
-
-fun println(message : Any?) = System.out.println(message)

compiler/testData/diagnostics/tests/inference/kt3184.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 //KT-3184 Type inference seems partially broken
 package a
 

compiler/testData/diagnostics/tests/inference/substitutions/kt32189returnTypeWithTypealiasSubtitution.fir.kt

@@ -1,37 +0,0 @@
-// !LANGUAGE: +NewInference
-// !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
-
-class B {
-    class Builder
-}
-
-typealias ApplyRestrictions = B.Builder.() -> B.Builder
-
-fun applyRestrictions1(): ApplyRestrictions = TODO()
-fun applyRestrictions2() = applyRestrictions1()
-fun <K> applyRestrictions3(e: K) = applyRestrictions1()
-
-fun buildB() {
-    val a1 = applyRestrictions1()
-    val a2 = applyRestrictions2()
-    val a3 = applyRestrictions3("foo")
-
-    B.Builder().a1()
-    B.Builder().a2()
-    B.Builder().a3()
-}
-
-// additional example from #KT-34820
-
-class R
-class P
-
-typealias F = R.(P) -> Unit
-
-fun guess(): F? = TODO()
-fun consume(f: F) {}
-
-fun problem() {
-    val p = guess()
-    <!INAPPLICABLE_CANDIDATE!>consume<!>(p ?: {})
-}

compiler/testData/diagnostics/tests/inference/substitutions/kt32189returnTypeWithTypealiasSubtitution.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER