Auto merge of #25519 - szeged:mmatyas__webgl_fns_uniforms, r=jdm

Add support for WebGL2 unsigned uniform operations

This adds support for the WebGL2 `uniform[1234]ui` and `uniform[1234]uiv` operations.

See: https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.8

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cc @jdm @zakorgy @imiklos

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