NI: propagate isNullabilityConstraint flag into constraint injector and inherit it

^KT-37510 Fixed

compiler/testData/diagnostics/testsWithStdLib/inference/nothingType/dontInferToNullableNothingInDelegates.fir.kt

@@ -0,0 +1,3 @@
+fun <K> materialize(): K? { return null }
+
+val x: String? by lazy { materialize() }

compiler/testData/diagnostics/testsWithStdLib/inference/nothingType/dontInferToNullableNothingInDelegates.kt

@@ -0,0 +1,3 @@
+fun <K> materialize(): K? { return null }
+
+val x: String? by lazy { <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.String?")!>materialize()<!> }

compiler/testData/diagnostics/testsWithStdLib/inference/nothingType/dontInferToNullableNothingInDelegates.txt

@@ -0,0 +1,4 @@
+package
+
+public val x: kotlin.String?
+public fun </*0*/ K> materialize(): K?