[red-knot] LSP: only emit WARN logs from non-red-knot sources (#16760) #18

Job	Run time
Determine changes	10s
cargo build (release)	5m 24s
cargo fmt	20s
mkdocs	2m 28s
python package	1m 22s
pre-commit	3m 28s
cargo clippy	2m 0s
cargo test (linux)	1s
test scripts	1m 8s
cargo fuzz build	4m 45s
cargo shear	24s
cargo test (windows)	1s
formatter instabilities and black similarity	3m 21s
cargo test (linux, release)	1d 0h 0m 0s
cargo test (wasm)	1m 50s
cargo build (msrv)	1s
benchmarks	0s
fuzz parser	-1s
test ruff-lsp	-1s
ecosystem	-1s
	1d 0h 26m 40s

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