test: add WPT user-timing tests (#32123)

As discussed in
https://github.com/servo/servo/pull/32120#issuecomment-2068017033, this
adds the WPT `user-timing` tests to the default list of WPT tests, and
also commits the current status of the `user-timing` tests.


---
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- [x] There are tests for these changes

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tests/wpt/meta/user-timing/measure-l3.any.js.ini

@@ -0,0 +1,20 @@
+[measure-l3.any.html]
+  [When the end mark is given and the start is unprovided, the end time of the measure entry should be the end mark's time, the start time should be 0.]
+    expected: FAIL
+
+  [When the start mark is given and the end is unprovided, the start time of the measure entry should be the start mark's time, the end should be now.]
+    expected: FAIL
+
+  [When start and end mark are both given, the start time and end time of the measure entry should be the the marks' time, repectively]
+    expected: FAIL
+
+
+[measure-l3.any.worker.html]
+  [When the end mark is given and the start is unprovided, the end time of the measure entry should be the end mark's time, the start time should be 0.]
+    expected: FAIL
+
+  [When the start mark is given and the end is unprovided, the start time of the measure entry should be the start mark's time, the end should be now.]
+    expected: FAIL
+
+  [When start and end mark are both given, the start time and end time of the measure entry should be the the marks' time, repectively]
+    expected: FAIL