compiler testdata: s/trait/interface

compiler/testData/diagnostics/tests/secondaryConstructors/constructorInTrait.kt

@@ -1,3 +1,3 @@
-trait A {
+interface A {
     <!CONSTRUCTOR_IN_TRAIT!>constructor()
 <!>}

compiler/testData/diagnostics/tests/secondaryConstructors/delegationByWithoutPrimary.kt

@@ -1,4 +1,4 @@
-trait A
+interface A
 class AImpl : A
 
 class B : <!UNSUPPORTED!>A by AImpl()<!> {

compiler/testData/diagnostics/tests/secondaryConstructors/noSupertypeInitWithSecondaryConstructors.kt

@@ -1,6 +1,6 @@
 open class B
-trait C
-trait D
+interface C
+interface D
 class A : C, B, D {
     constructor()
 }

compiler/testData/diagnostics/tests/secondaryConstructors/superSecondaryNonExisting.kt

@@ -3,7 +3,7 @@ open class B(x: Double) {
     constructor(x: Int): this(1.0)
     constructor(x: String): this(1.0)
 }
-trait C
+interface C
 class A : B, C {
     constructor(): <!NONE_APPLICABLE!>super<!>(' ')
     <!EXPLICIT_DELEGATION_CALL_REQUIRED!>constructor(x: Int)<!>