[FIR] Implement new completion mode calculator

Note that `testDelegates` now fails due to KT-37638 and
    `testSimpleIn` fails due to problems with type parameters
    of inner classes

compiler/testData/diagnostics/tests/generics/innerClasses/simpleIn.fir.fail

@@ -0,0 +1,2 @@
+Failures detected in FirBodyResolveTransformerAdapter, file: /simpleIn.fir.kt
+Cause: java.lang.RuntimeException: While resolving call R|<local>/outer|.set#(R?C|/infer|<R|kotlin/Any|>(String()))

compiler/testData/diagnostics/tests/inference/regressions/kt32250.fir.kt

@@ -1,30 +0,0 @@
-// !LANGUAGE: +NewInference
-// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
-
-interface I {
-    fun foo()
-}
-
-data class Pair<X, Y>(val fst: X, val snd: Y)
-
-class A(f: Pair<Int, (I) -> Unit>? = null)
-
-class B(f: ((I) -> Unit)? = null)
-
-fun main() {
-    val cond = true
-    A(
-        if (cond) {
-            Pair(1, { baz -> baz.<!UNRESOLVED_REFERENCE!>foo<!>() })
-        } else {
-            null
-        }
-    )
-    <!INAPPLICABLE_CANDIDATE!>B<!>(
-        if (cond) {
-            { baz -> baz.<!UNRESOLVED_REFERENCE!>foo<!>() }
-        } else {
-            null
-        }
-    )
-}

compiler/testData/diagnostics/tests/inference/regressions/kt32250.kt

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