Cherry-picked PRs:
- #9264: fix(core): implement value comparison for max_inter_stage_shader_variables
- #9284: fix(metal): Check respondsToSelector before feature detection calls
- #9302: fix(gles): texture height initialized incorrectly in create_texture
- #8808: Fix up CreateTextureViewError::TooManyMipLevels/ArrayLayers crashes
Plus revert of https://github.com/gfx-rs/wgpu/commit/c8194847515e1075f34f504f0974cc48b2ba671e

Bump workspace version to 29.0.1 and update changelog.