Auto merge of #20631 - brainlessdeveloper:add-webgl-get-renderbuffer-parameter, r=emilio

Implement WebGL GetRenderbufferParameter

This needed a bump of gleam to version 0.4.33 for this https://github.com/servo/gleam/pull/162

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

I think my changes in test expectations are pretty naive and I have to wait for the PR to run on CI to see what the actual impact is. I'd like some guidance on this, too.

---
<!-- 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 build-geckolib` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #20514 (github issue number if applicable).

<!-- Either: -->
- [x] There are tests for these changes OR
- [ ] 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. -->

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/20631)
<!-- Reviewable:end -->

components/canvas_traits/webgl.rs

@@ -220,6 +220,7 @@ pub enum WebGLCommand {
     GetShaderInfoLog(WebGLShaderId, WebGLSender<String>),
     GetProgramInfoLog(WebGLProgramId, WebGLSender<String>),
     GetFramebufferAttachmentParameter(u32, u32, u32, WebGLSender<i32>),
+    GetRenderbufferParameter(u32, u32, WebGLSender<i32>),
     PolygonOffset(f32, f32),
     RenderbufferStorage(u32, u32, i32, i32),
     ReadPixels(i32, i32, i32, i32, u32, u32, WebGLSender<ByteBuf>),
@@ -494,6 +495,7 @@ impl fmt::Debug for WebGLCommand {
             GetVertexAttrib(..) => "GetVertexAttrib",
             GetVertexAttribOffset(..) => "GetVertexAttribOffset",
             GetFramebufferAttachmentParameter(..) => "GetFramebufferAttachmentParameter",
+            GetRenderbufferParameter(..) => "GetRenderbufferParameter",
             PolygonOffset(..) => "PolygonOffset",
             ReadPixels(..) => "ReadPixels",
             RenderbufferStorage(..) => "RenderbufferStorage",