Tag resolving Scala CLI nightly versions as flaky on the CI

Author: Gedochao

modules/cli/src/test/scala/cli/tests/LauncherCliTest.scala

@@ -8,8 +8,9 @@ import scala.cli.commands.shared.CoursierOptions
 import scala.cli.launcher.LauncherCli
 
 class LauncherCliTest extends munit.FunSuite {
+  override def munitFlakyOK: Boolean = TestUtil.isCI
 
-  test("resolve nightly version") {
+  test("resolve nightly version".flaky) {
     val logger          = TestLogger()
     val cache           = CoursierOptions().coursierCache(logger.coursierLogger(""))
     val scalaParameters = ScalaParameters(Constants.defaultScalaVersion)

modules/cli/src/test/scala/cli/tests/TestUtil.scala

@@ -22,4 +22,5 @@ object TestUtil {
 
     file.map(f => os.read.bytes(os.Path(f, os.pwd)))
   }
+  val isCI: Boolean = System.getenv("CI") != null
 }