FIR: set isConst on primary constructor properties

compiler/fir/analysis-tests/testData/resolve/constVal/constValNotTopLevelOrObject.fir.txt

@@ -11,10 +11,13 @@ FILE: constValNotTopLevelOrObject.kt
 
     }
     public final class C : R|kotlin/Any| {
-        public constructor(): R|C| {
+        public constructor(b: R|kotlin/Boolean|): R|C| {
             super<R|kotlin/Any|>()
         }
 
+        public final const val b: R|kotlin/Boolean| = R|<local>/b|
+            public get(): R|kotlin/Boolean|
+
         public final const val c: R|kotlin/Int| = Int(3)
             public get(): R|kotlin/Int|
 

compiler/fir/analysis-tests/testData/resolve/constVal/constValNotTopLevelOrObject.kt

@@ -4,7 +4,7 @@ object B {
     const val b = 2
 }
 
-class C {
+class C(<!CONST_VAL_NOT_TOP_LEVEL_OR_OBJECT!>const<!> val b: Boolean) {
     <!CONST_VAL_NOT_TOP_LEVEL_OR_OBJECT!>const<!> val c = 3
 }