[ML] Unmute XPackRestIT and mute all ml and transform tests (elastic#121764)

Author: davidkyle

muted-tests.yml

@@ -525,6 +525,12 @@ tests:
 - class: org.elasticsearch.smoketest.DocsClientYamlTestSuiteIT
   method: test {yaml=reference/rest-api/common-options/line_102}
   issue: https://github.com/elastic/elasticsearch/issues/121748
+- class: org.elasticsearch.xpack.test.rest.XPackRestIT
+  method: test {p0=transform/*}
+  issue: https://github.com/elastic/elasticsearch/issues/120816
+- class: org.elasticsearch.xpack.test.rest.XPackRestIT
+  method: test {p0=ml/*}
+  issue: https://github.com/elastic/elasticsearch/issues/120816
 - class: org.elasticsearch.xpack.ml.integration.ClassificationIT
   method: testDependentVariableIsNested
   issue: https://github.com/elastic/elasticsearch/issues/121458