Auto merge of #26769 - kunalmohan:gpu-render-pass, r=kvark

Implement GPURenderPassEncoder

Add webidls for GPURenderPassEncoder and  GPURenderEncoderBase and
implement relevant methods.

<!-- Please describe your changes on the following line: -->
r?@kvark

---
<!-- 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
- [ ] These changes fix #___ (GitHub issue number if applicable)

<!-- Either: -->
- [ ] 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. -->

Cargo.lock

@@ -1895,7 +1895,6 @@ dependencies = [
  "raw-window-handle",
  "smallvec 1.3.0",
  "winapi",
- "x11",
 ]
 
 [[package]]
@@ -6592,7 +6591,7 @@ dependencies = [
 [[package]]
 name = "wgpu-core"
 version = "0.5.0"
-source = "git+https://github.com/gfx-rs/wgpu#a203333c3e144cfd431c812213966ee32ae59d98"
+source = "git+https://github.com/gfx-rs/wgpu#ac9587e9ced5b043abad68e260cb8c9e812cffb5"
 dependencies = [
  "arrayvec 0.5.1",
  "bitflags",
@@ -6621,7 +6620,7 @@ dependencies = [
 [[package]]
 name = "wgpu-types"
 version = "0.5.0"
-source = "git+https://github.com/gfx-rs/wgpu#a203333c3e144cfd431c812213966ee32ae59d98"
+source = "git+https://github.com/gfx-rs/wgpu#ac9587e9ced5b043abad68e260cb8c9e812cffb5"
 dependencies = [
  "bitflags",
  "peek-poke 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",