KT-46146 'protected' and 'private' only for sealed constructors

Prior to this commit we suggested two invalid intentions for sealed
class constructors: change visibility to 'public' and 'internal'.

^KT-46146 Fixed

idea/testData/intentions/changeVisibility/internal/notForSealedPrimaryConstructor.kt

@@ -0,0 +1,2 @@
+// IS_APPLICABLE: false
+sealed class C <caret>private constructor()

idea/testData/intentions/changeVisibility/internal/notForSealedSecondaryConstructor.kt

@@ -0,0 +1,4 @@
+// IS_APPLICABLE: false
+sealed class C {
+    <caret>private constructor()
+}

idea/testData/intentions/changeVisibility/public/notForSealedPrimaryConstructor.kt

@@ -0,0 +1,2 @@
+// IS_APPLICABLE: false
+sealed class C <caret>private constructor()

idea/testData/intentions/changeVisibility/public/notForSealedSecondaryConstructor.kt

@@ -0,0 +1,4 @@
+// IS_APPLICABLE: false
+sealed class C {
+    <caret>private constructor()
+}