Auto merge of #12629 - notriddle:intermittents, r=aneeshusa

Intermittents

We probably want to have Buildbot run that script.

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #12435, #11574, and #11561
- [X] These changes do not require tests because reasons

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This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/12629)
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tests/wpt/metadata-css/css-transforms-1_dev/html/transform-abspos-002.htm.ini

@@ -1,3 +0,0 @@
-[transform-abspos-002.htm]
-  type: reftest
-  disabled: https://github.com/servo/servo/issues/11561

tests/wpt/metadata-css/css-transforms-1_dev/html/transform-abspos-007.htm.ini

@@ -1,3 +0,0 @@
-[transform-abspos-007.htm]
-  type: reftest
-  disabled: https://github.com/servo/servo/issues/11561

tests/wpt/metadata-css/css-transforms-1_dev/html/transform-table-007.htm.ini

@@ -1,3 +0,0 @@
-[transform-table-007.htm]
-  type: reftest
-  disabled: https://github.com/servo/servo/issues/11574