[red-knot] Support `TypeGuard` and `TypeIs` #41215

Job	Run time
mkdocs	2m 33s
cargo build (release)	0s
cargo fmt	20s
Determine changes	8s
pre-commit	3m 19s
python package	1m 24s
cargo build (msrv)	1m 33s
cargo fuzz build	4m 17s
benchmarks	4m 16s
cargo clippy	1m 9s
cargo shear	21s
cargo test (linux)	1m 3s
cargo test (linux, release)	3m 29s
cargo test (wasm)	1m 34s
cargo test (windows)	3m 14s
test scripts	53s
formatter instabilities and black similarity	0s
fuzz parser	0s
ecosystem	0s
test ruff-lsp	0s
	29m 33s

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