FIX: render plugin's commit URL correctly and open in new window. (#22273)

Previously, the URLs are missed in the commit links in the version column. Follow up to: https://github.com/discourse/discourse/pull/22176

app/assets/javascripts/admin/addon/components/plugin-commit-hash.hbs

@@ -1,6 +1,8 @@
 {{#if this.commitHash}}
   <a
-    href={{this.plugin.commit_url}}
+    href={{@plugin.commit_url}}
+    target="_blank"
+    rel="noopener noreferrer"
     class="current commit-hash"
     title={{this.commitHash}}
   >{{this.shortCommitHash}}</a>

app/assets/javascripts/discourse/tests/acceptance/admin-plugins-test.js

@@ -28,6 +28,9 @@ acceptance("Admin - Plugins", function (needs) {
             enabled_setting: "testplugin_enabled",
             has_settings: true,
             is_official: true,
+            commit_hash: "1234567890abcdef",
+            commit_url:
+              "https://github.com/username/some-test-plugin/commit/1234567890abcdef",
           },
         ],
       })
@@ -47,5 +50,11 @@ acceptance("Admin - Plugins", function (needs) {
       exists(".admin-plugins .admin-container .alert-error"),
       "displays an error for unknown routes"
     );
+
+    assert.strictEqual(
+      table.querySelector("tr .version a.commit-hash").href,
+      "https://github.com/username/some-test-plugin/commit/1234567890abcdef",
+      "displays a commit hash with a link to commit url"
+    );
   });
 });