Fix panic in the GLES backend when creating a pipeline with opaque ty…

[James2022-rgb]

…pes other than samplers.

Checklist

• Run cargo clippy.
• Run RUSTFLAGS=--cfg=web_sys_unstable_apis cargo clippy --target wasm32-unknown-unknown if applicable.
  Done, with --feature gles.
• Add change to CHANGELOG.md. See simple instructions inside file.

Connections
Fixes issue #3337

Description
wgpu_hal::gles::device::Device::create_pipeline was taking into account sampler types when collecting UniformDescs, but not other opaque types such as images and atomic counters,
which led to the panic! here:

wgpu/wgpu-hal/src/gles/conv.rs

Lines 442 to 453 in a06ef71

	pub(super) fn uniform_byte_size(glsl_uniform_type: u32) -> u32 {
	match glsl_uniform_type {
	glow::FLOAT | glow::INT => 4,
	glow::FLOAT_VEC2 | glow::INT_VEC2 => 8,
	glow::FLOAT_VEC3 | glow::INT_VEC3 => 12,
	glow::FLOAT_VEC4 | glow::INT_VEC4 => 16,
	glow::FLOAT_MAT2 => 16,
	glow::FLOAT_MAT3 => 36,
	glow::FLOAT_MAT4 => 64,
	_ => panic!("Unsupported uniform datatype!"),
	}
	}

This PR adds checks for these other opaque types in addition to samplers.

Testing
Tested locally on my Galaxy S20 Ultra 5G, confirming the result of the textureStore in the glDispatchCompute with RenderDoc.

[codecov-commenter]

Codecov Report

Merging #3361 (eddb415) into master (a06ef71) will increase coverage by 0.00%.
The diff coverage is 86.66%.

@@           Coverage Diff           @@
##           master    #3361   +/-   ##
=======================================
  Coverage   64.49%   64.50%           
=======================================
  Files          86       86           
  Lines       42696    42709   +13     
=======================================
+ Hits        27537    27548   +11     
- Misses      15159    15161    +2     

Impacted Files	Coverage Δ
wgpu-hal/src/gles/conv.rs	75.89% <85.71%> (+0.60%)	⬆️
wgpu-hal/src/gles/device.rs	80.18% <100.00%> (ø)
wgpu-core/src/hub.rs	60.67% <0.00%> (-0.16%)	⬇️

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[nical]

Thanks!