[Swift Export] Fix test infrastructure according to the review

native/swift/sir/build.gradle.kts

@@ -7,11 +7,10 @@ description = "Swift Intermediate Representation"
 dependencies {
     compileOnly(kotlinStdlib())
 
-    testApi(platform(libs.junit.bom))
+    testImplementation(kotlin("test-junit5"))
+    testImplementation(platform(libs.junit.bom))
     testImplementation(libs.junit.jupiter.api)
     testRuntimeOnly(libs.junit.jupiter.engine)
-
-    testImplementation(projectTests(":compiler:tests-common"))
 }
 
 sourceSets {
@@ -20,4 +19,9 @@ sourceSets {
         generatedDir()
     }
     "test" { projectDefault() }
-}
+}
+
+projectTest(jUnitMode = JUnitMode.JUnit5) {
+    workingDir = rootDir
+    useJUnitPlatform { }
+}

native/swift/sir/tests/org/jetbrains/kotlin/sir/SirTest.kt

@@ -5,9 +5,8 @@
 
 package org.jetbrains.kotlin.sir
 
-import org.jetbrains.kotlin.sir.builder.SirEnumBuilder
 import org.jetbrains.kotlin.sir.builder.buildEnum
-import org.junit.Test
+import kotlin.test.Test
 import kotlin.test.assertTrue
 
 class SirTest {