Resolution: extract projections from captured flexible type properly

#KT-54100 Fixed
Related to KT-54196, KT-54198

compiler/resolution.common/src/org/jetbrains/kotlin/resolve/calls/inference/components/VariableFixationFinder.kt

@@ -204,9 +204,15 @@ class VariableFixationFinder(
 inline fun TypeSystemInferenceExtensionContext.isProperTypeForFixation(type: KotlinTypeMarker, isProper: (KotlinTypeMarker) -> Boolean) =
     isProper(type) && extractProjectionsForAllCapturedTypes(type).all(isProper)
 
-@OptIn(ExperimentalStdlibApi::class)
 fun TypeSystemInferenceExtensionContext.extractProjectionsForAllCapturedTypes(baseType: KotlinTypeMarker): Set<KotlinTypeMarker> {
-    val simpleBaseType = baseType.asSimpleType()
+    if (baseType.isFlexible()) {
+        val flexibleType = baseType.asFlexibleType()!!
+        return buildSet {
+            addAll(extractProjectionsForAllCapturedTypes(flexibleType.lowerBound()))
+            addAll(extractProjectionsForAllCapturedTypes(flexibleType.upperBound()))
+        }
+    }
+    val simpleBaseType = baseType.asSimpleType()?.originalIfDefinitelyNotNullable()
 
     return buildSet {
         val projectionType = if (simpleBaseType is CapturedTypeMarker) {

compiler/resolution.common/src/org/jetbrains/kotlin/resolve/calls/inference/model/NewConstraintSystemImpl.kt

@@ -289,7 +289,7 @@ class NewConstraintSystemImpl(
     private fun isProperTypeImpl(type: KotlinTypeMarker): Boolean =
         !type.contains {
             val capturedType = it.asSimpleType()?.asCapturedType()
-            // TODO: change NewCapturedType to markered one for FE-IR
+
             val typeToCheck = if (capturedType is CapturedTypeMarker && capturedType.captureStatus() == CaptureStatus.FROM_EXPRESSION)
                 capturedType.typeConstructorProjection().takeUnless { projection -> projection.isStarProjection() }?.getType()
             else