Use WebGL2 instead of WebGPU #628

Job	Run time
rustfmt	11s
test (1.70.0, x86_64-pc-windows-msvc, windows-2019)	18m 4s
test (1.70.0, x86_64-pc-windows-gnu, windows-2019, -x86_64-pc-windows-gnu)	22m 47s
test (1.70.0, x86_64-unknown-linux-gnu, ubuntu-latest)	9m 11s
test (1.70.0, x86_64-apple-darwin, macos-latest)	14m 30s
test (stable, x86_64-pc-windows-msvc, windows-2019)	20m 28s
test (stable, x86_64-pc-windows-gnu, windows-2019, -x86_64-pc-windows-gnu)	19m 55s
test (stable, x86_64-unknown-linux-gnu, ubuntu-latest)	8m 55s
test (stable, x86_64-apple-darwin, macos-latest)	22m 54s
test (beta, x86_64-pc-windows-msvc, windows-2019)	19m 19s
test (beta, x86_64-pc-windows-gnu, windows-2019, -x86_64-pc-windows-gnu)	20m 40s
test (beta, x86_64-unknown-linux-gnu, ubuntu-latest)	8m 20s
test (beta, x86_64-apple-darwin, macos-latest)	17m 21s
test (nightly, x86_64-pc-windows-msvc, windows-2019)	18m 48s
test (nightly, x86_64-pc-windows-gnu, windows-2019, -x86_64-pc-windows-gnu)	18m 32s
test (nightly, x86_64-unknown-linux-gnu, ubuntu-latest)	8m 16s
test (nightly, x86_64-apple-darwin, macos-latest)	12m 30s
	4h 20m 41s

Provide feedback