Auto merge of #25334 - asajeffrey:gstplugins-misc-tidying-up, r=jdm

Gstreamer plugin running in wayland with surfman 0.2

<!-- Please describe your changes on the following line: -->

Tidying up the gstreamer plugin. The plugin now:

* uses surfman 0.2
* runs in wayland (but can't render WebGL content yet)
* gets its GL configuration from gstreamer
* uses GLsync if needed

---
<!-- 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] These changes fix #24843
- [X] These changes do not require tests because

<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->

<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->

0 files changed, 0 insertions, 0 deletions