Auto merge of #23598 - georgeroman:redirect_wdspec_tests_errors, r=jdm

Filter intermittent wdspec tests failures

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With this change, the intermittent failures for wdspec tests will be filtered and reported.

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors

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etc/taskcluster/decision_task.py

@@ -616,8 +616,15 @@ def wpt_chunks(platform, make_chunk_task, build_task, total_chunks, processes,
                 time ./mach test-wpt --release --processes $PROCESSES --timeout-multiplier=4 \
                     --headless --log-raw test-wdspec.log \
                     --log-errorsummary wdspec-errorsummary.log \
+                    --always-succeed \
                     webdriver \
                     | cat
+                ./mach filter-intermittents \
+                    wdspec-errorsummary.log \
+                    --log-intermittents intermittents.log \
+                    --log-filteredsummary filtered-wdspec-errorsummary.log \
+                    --tracker-api default \
+                    --reporter-api default
             """)
         # `test-wpt` is piped into `cat` so that stdout is not a TTY
         # and wptrunner does not use "interactive mode" formatting: