Add support for simple generic type variables to UP040 #16159

Job	Run time
cargo fmt	17s
Determine changes	7s
cargo clippy	2m 8s
cargo fuzz	8m 10s
cargo test \| ubuntu-latest	6m 14s
cargo test \| windows-latest	9m 1s
cargo test (wasm)	1m 30s
cargo udeps	2m 41s
test scripts	1m 2s
mkdocs	2m 11s
pre-commit	1m 46s
python package	1m 42s
Formatter ecosystem and progress checks	0s
ecosystem	2m 31s
	39m 20s

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