Temporarily tag CLI docker image tests as flaky

Author: Gedochao

modules/integration/src/test/scala/scala/cli/integration/NativePackagerTests.scala

@@ -409,7 +409,8 @@ class NativePackagerTests extends ScalaCliSuite {
     ((Properties.isMac || Properties.isWin) && !TestUtil.isCI)
 
   if (hasDocker) {
-    test("building docker image") {
+    // TODO: restore this test when `registry-1.docker.io` is stable again
+    test("building docker image".flaky) {
       TestUtil.retryOnCi() {
         runTest()
       }

modules/integration/src/test/scala/scala/cli/integration/PackageTestDefinitions.scala

@@ -1161,13 +1161,15 @@ abstract class PackageTestDefinitions extends ScalaCliSuite with TestScalaVersio
   }
 
   if (Properties.isLinux) {
-    test("pass java options to docker") {
+    // TODO: restore this test when `registry-1.docker.io` is stable again
+    test("pass java options to docker".flaky) {
       TestUtil.retryOnCi() {
         javaOptionsDockerTest()
       }
     }
 
-    test("pass extra directory to docker") {
+    // TODO: restore this test when `registry-1.docker.io` is stable again
+    test("pass extra directory to docker".flaky) {
       TestUtil.retryOnCi() {
         dockerWithExtraDirsTest()
       }