Implement a URL-generic type for ListStyleImage
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This should fix the following two "expected to fail" tests described in https://github.com/servo/servo/issues/18015:
- getComputedStyle(elem) for url() listStyleImage uses the resolved URL
and elem.style uses the original URL
- getComputedStyle(elem) for url() listStyle uses the resolved URL
and elem.style uses the original URL
I updated the test failure expectations by removing the corresponding `.ini` file.
---
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- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#18015 (github issue number if applicable).
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- [x] There are tests for these changes OR
- [ ] These changes do not require tests because _____
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This should fix the following two "expected to fail" tests:
- getComputedStyle(elem) for url() listStyleImage uses the resolved URL
and elem.style uses the original URL
- getComputedStyle(elem) for url() listStyle uses the resolved URL
and elem.style uses the original URL
Extract text emphasis style
<!-- Please describe your changes on the following line: -->
Extracted the text-emphasis-style property out of the inherited_text.mako.rs.
This is a part of #19015
---
<!-- 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
- [X] `./mach cargo-geckolib check` does not report any errors
- [X] These changes fix#19940 (github issue number if applicable).
<!-- Either: -->
- [X] These changes do not require tests because it's a refactoring
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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/20252)
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