Warn instead of error when removed rules are used in ignore #35900

Job	Run time
mkdocs	1m 53s
pre-commit	43s
cargo fmt	18s
Determine changes	9s
python package	1m 17s
benchmarks	4m 48s
cargo clippy	2m 28s
cargo build (release)	5m 57s
cargo build (msrv)	3m 59s
cargo fuzz	5m 12s
cargo test (linux)	4m 13s
cargo shear	21s
cargo test (wasm)	1m 40s
cargo test (windows)	7m 29s
test scripts	1m 3s
formatter instabilities and black similarity	0s
test ruff-lsp	34s
ecosystem	9m 14s
Fuzz the parser	0s
	51m 18s

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