tests: filter snapshots of fileset/revset expressions to save vertical space #12078

Job	Run time
Build jj-lib without Git support	42s
Check formatting	15s
build (ubuntu-latest)	3m 58s
build (macos-14)	3m 10s
build (windows-latest)	8m 24s
build (ubuntu-latest, --all-features)	5m 1s
cargo-deny (advisories)	22s
cargo-deny (bans licenses sources)	24s
Check protos	26s
Clippy check	2m 33s
Check that MkDocs can build the docs	21s
Check that MkDocs can build the docs with Poetry 1.8	28s
	26m 4s

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