Enable DefinitelyNotNullTypeParameters since 1.7

^KT-26245 In Progress

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/SimpleKotlinGradleIT.kt

@@ -67,7 +67,7 @@ class SimpleKotlinGradleIT : KGPBaseTest() {
     fun testLanguageVersion(gradleVersion: GradleVersion) {
         project("languageVersion", gradleVersion) {
             buildAndFail("build") {
-                assertOutputContains("The feature \"definitely not null type parameters\" is only available since language version 1.6")
+                assertOutputContains("Suspend function type is not allowed as supertypes")
             }
         }
     }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/languageVersion/src/main/kotlin/helloWorld.kt

@@ -1 +1 @@
-fun <T> f(t: T): T!! = t!!
+interface A : suspend () -> Unit

libraries/tools/kotlin-maven-plugin-test/src/it/test-languageVersion/src/main/kotlin/main.kt

@@ -1 +1 @@
-fun <T> f(t: T): T!! = t!!
+interface A : suspend () -> Unit

libraries/tools/kotlin-maven-plugin-test/src/it/test-languageVersion/verify.bsh

@@ -1,4 +1,4 @@
 source(new File(basedir, "../../../verify-common.bsh").getAbsolutePath());
 
 assertBuildLogHasLine("[INFO] BUILD FAILURE");
-assertBuildLogHasLineThatContains("The feature \"definitely not null type parameters\" is only available since language version 1.6");
+assertBuildLogHasLineThatContains("Suspend function type is not allowed as supertypes");