FIR checkers: simplify hasPrimaryConstructor by source element check

compiler/testData/diagnostics/tests/SupertypeListChecks.fir.kt

@@ -21,7 +21,7 @@ interface T1 {}
 
 interface T2<T> {}
 
-interface Test() {
+interface <!CONSTRUCTOR_IN_INTERFACE!>Test()<!> {
 }
 
 interface Test1 : <!INTERFACE_WITH_SUPERCLASS, SUPERTYPE_INITIALIZED_IN_INTERFACE!>C2<!>() {}

compiler/testData/diagnostics/tests/TraitWithConstructor.fir.kt

@@ -2,11 +2,11 @@
 
 class C(val a: String) {}
 
-interface T1(val x: String) {}
+interface <!CONSTRUCTOR_IN_INTERFACE!>T1(val x: String)<!> {}
 
-interface T2 constructor() {}
+interface <!CONSTRUCTOR_IN_INTERFACE!>T2 constructor()<!> {}
 
-interface T3 private constructor(a: Int) {}
+interface <!CONSTRUCTOR_IN_INTERFACE!>T3 private constructor(a: Int)<!> {}
 
 interface T4 {
     <!CONSTRUCTOR_IN_INTERFACE!>constructor(a: Int)<!> {
@@ -14,5 +14,5 @@ interface T4 {
     }
 }
 
-interface T5 private () : T4 {}
-interface T6 private<!SYNTAX!><!> : T5 {}
+interface <!CONSTRUCTOR_IN_INTERFACE!>T5 private ()<!> : T4 {}
+interface <!CONSTRUCTOR_IN_INTERFACE!>T6<!> private<!SYNTAX!><!> : T5 {}

compiler/testData/diagnostics/tests/traitWithRequired/traitSupertypeList.fir.kt

@@ -1,6 +1,6 @@
 open class bar()
 
-interface Foo() : <!INTERFACE_WITH_SUPERCLASS!>bar<!>(), bar, bar {
+interface <!CONSTRUCTOR_IN_INTERFACE!>Foo()<!> : <!INTERFACE_WITH_SUPERCLASS!>bar<!>(), bar, bar {
 }
 
 interface Foo2 : <!INTERFACE_WITH_SUPERCLASS!>bar<!>, Foo {