Re-enable PluginCliTests.test20SymlinkPluginsDir (#62736)

This test was disabled with an awaits fix, but the underlying issue has
been worked around, so the test can be re-enabled.

relates #46050
relates #58628

qa/os/src/test/java/org/elasticsearch/packaging/test/PluginCliTests.java

@@ -69,7 +69,6 @@ public class PluginCliTests extends PackagingTestCase {
         install();
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/58605")
     public void test20SymlinkPluginsDir() throws Exception {
         Path pluginsDir = installation.plugins;
         Path stashedPluginsDir = createTempDir("stashed-plugins");