[FIR] Support boolean elvis bound smartcasts

#KT-44511 Fixed

compiler/fir/analysis-tests/testData/resolve/smartcasts/booleans/booleanElvisBoundSmartcast.fir.txt

@@ -0,0 +1,35 @@
+FILE: booleanElvisBoundSmartcast.kt
+    public final class A : R|kotlin/Any| {
+        public constructor(b: R|kotlin/Boolean|): R|A| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final val b: R|kotlin/Boolean| = R|<local>/b|
+            public get(): R|kotlin/Boolean|
+
+        public final fun foo(): R|kotlin/Unit| {
+        }
+
+    }
+    public final fun test_1(a: R|A?|): R|kotlin/Unit| {
+        when () {
+            R|<local>/a|?.{ $subj$.R|/A.b| } ?: Boolean(false) ->  {
+                R|<local>/a|.R|/A.foo|()
+            }
+            else ->  {
+                R|<local>/a|.<Inapplicable(INAPPLICABLE_WRONG_RECEIVER): /A.foo>#()
+            }
+        }
+
+    }
+    public final fun test_2(a: R|A?|): R|kotlin/Unit| {
+        when () {
+            R|<local>/a|?.{ $subj$.R|/A.b| } ?: Boolean(true) ->  {
+                R|<local>/a|.<Inapplicable(INAPPLICABLE_WRONG_RECEIVER): /A.foo>#()
+            }
+            else ->  {
+                R|<local>/a|.R|/A.foo|()
+            }
+        }
+
+    }

compiler/fir/analysis-tests/testData/resolve/smartcasts/booleans/booleanElvisBoundSmartcast.kt

@@ -0,0 +1,22 @@
+// !LANGUAGE: +BooleanElvisBoundSmartCasts
+// ISSUE: KT-44511, also relates to KT-8492 and KT-26357
+
+class A(val b: Boolean) {
+    fun foo() {}
+}
+
+fun test_1(a: A?) {
+    if (a?.b ?: false) {
+        a.foo() // OK
+    } else {
+        a<!UNSAFE_CALL!>.<!>foo() // Error
+    }
+}
+
+fun test_2(a: A?) {
+    if (a?.b ?: true) {
+        a<!UNSAFE_CALL!>.<!>foo() // Error
+    } else {
+        a.foo() // OK
+    }
+}