[kotlin-test] Exclude kotlin-test project from GE test splitting

Not supported for kotlin-multiplatform tests

KT-61969

build.gradle.kts

@@ -469,6 +469,7 @@ val coreLibProjects by extra {
 val mppProjects by extra {
     listOf(
         ":kotlin-stdlib",
+        ":kotlin-test",
     )
 }