Introduce FirInitializerTypeMismatchChecker

compiler/testData/diagnostics/tests/controlStructures/kt770.kt351.kt735_StatementType.fir.kt

@@ -27,7 +27,7 @@ fun foo() {
             z = 34
         }
     }
-    val f: ()-> Int = r
+    val f: ()-> Int = <!INITIALIZER_TYPE_MISMATCH!>r<!>
     val g: ()-> Any = r
 }
 
@@ -80,7 +80,7 @@ fun testCoercionToUnit() {
             45
         }
     }
-    val f : () -> String = checkType
+    val f : () -> String = <!INITIALIZER_TYPE_MISMATCH!>checkType<!>
 }
 
 fun doSmth(i: Int) {}

compiler/testData/diagnostics/tests/controlStructures/specialConstructsAndPlatformTypes.fir.kt

@@ -12,7 +12,7 @@ public class J {
 val testImplicitExclExcl1: String = J.s
 val testImplicitExclExcl2: String? = J.s
 
-val testImplicitExclExcl3: String = J.m[""]
+val testImplicitExclExcl3: String = <!INITIALIZER_TYPE_MISMATCH!>J.m[""]<!>
 val testImplicitExclExcl4: String? = J.m[""]
 
 val testExclExcl1: String = J.s!!
@@ -21,20 +21,20 @@ val testExclExcl2: String? = J.s!!
 val testExclExcl3: String = J.m[""]!!
 val testExclExcl4: String? = J.m[""]!!
 
-val testSafeCall1: String = J.s?.let { it }
+val testSafeCall1: String = <!INITIALIZER_TYPE_MISMATCH!>J.s?.let { it }<!>
 val testSafeCall2: String? = J.s?.let { it }
 
-val testSafeCall3: String = J.m[""]?.let { it }
+val testSafeCall3: String = <!INITIALIZER_TYPE_MISMATCH!>J.m[""]?.let { it }<!>
 val testSafeCall4: String? = J.m[""]?.let { it.toString() }
 
 val testIf1: String = if (true) J.s else J.s
 val testIf2: String? = if (true) J.s else J.s
 
-val testIf3: String = if (true) J.m[""] else J.m[""]
+val testIf3: String = <!INITIALIZER_TYPE_MISMATCH!>if (true) J.m[""] else J.m[""]<!>
 val testIf4: String? = if (true) J.m[""] else J.m[""]
 
 val testWhen1: String = when { else -> J.s }
 val testWhen2: String? = when { else -> J.s }
 
-val testWhen3: String = when { else -> J.m[""] }
+val testWhen3: String = <!INITIALIZER_TYPE_MISMATCH!>when { else -> J.m[""] }<!>
 val testWhen4: String? = when { else -> J.m[""] }