Auto merge of #18283 - ferjm:user.timing.api, r=jdm

User Timing API

- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #18109
- [X] There are tests for these changes. I enabled the peformance-timeline API WPTs but some of them are still failing because of implementation bugs or missing APIs (Resource Timing, for instance) the tests are dependent of. I'll file issues to fix them.

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tests/wpt/mozilla/meta/MANIFEST.json

@@ -28013,7 +28013,7 @@
    "testharness"
   ],
   "mozilla/interfaces.html": [
-   "a7ed38b6069caffd87d9573978e6ef9938d87753",
+   "66e66d3bdfa3bebd5bf3d711c0737fb394efe973",
    "testharness"
   ],
   "mozilla/interfaces.js": [
@@ -28021,7 +28021,7 @@
    "support"
   ],
   "mozilla/interfaces.worker.js": [
-   "fb5537ec0753e3a1c56dff957bcc1c0660dcb7b9",
+   "c9dcc4f24540914b3be1ef18f13b721773eb76be",
    "testharness"
   ],
   "mozilla/iterable.html": [