[Test] Migrate SpecTestsConsistencyTest to JUnit5

compiler/tests-spec/build.gradle.kts

@@ -7,10 +7,8 @@ dependencies {
     testCompile(projectTests(":compiler"))
     testImplementation(projectTests(":compiler:test-infrastructure"))
     testImplementation(projectTests(":compiler:tests-common-new"))
-    testRuntimeOnly(platform("org.junit:junit-bom:5.7.0"))
-    testRuntimeOnly("org.junit.jupiter:junit-jupiter")
 
-    testCompileOnly(intellijDep()) {
+    testCompile(intellijDep()) {
         includeJars("groovy", "groovy-xml", rootProject = rootProject)
     }
     testCompile(intellijDep()) {
@@ -21,6 +19,8 @@ dependencies {
     compile("org.jsoup:jsoup:1.10.3")
     if (isIdeaActive) testRuntimeOnly(files("${rootProject.projectDir}/dist/kotlinc/lib/kotlin-reflect.jar"))
     testRuntime(project(":kotlin-reflect"))
+
+    testApiJUnit5(vintageEngine = true)
 }
 
 sourceSets {
@@ -42,10 +42,10 @@ val printSpecTestsStatistic by generator("org.jetbrains.kotlin.spec.utils.tasks.
 
 val specConsistencyTests by task<Test> {
     workingDir = rootDir
-
     filter {
         includeTestsMatching("org.jetbrains.kotlin.spec.consistency.SpecTestsConsistencyTest")
     }
+    useJUnitPlatform()
 }
 
 tasks.named<Test>("test") {