Add `--reversed` flag to `evolog` #17435

Job	Run time
Build jj-lib without Git support	45s
Build jj-lib without Git support	45s
build (ubuntu-latest)	5m 4s
build (ubuntu-latest)	5m 4s
build (macos-13)	7m 21s
build (macos-13)	7m 21s
Run doctests	2m 20s
Run doctests	2m 20s
build (macos-14)	3m 38s
build (macos-14)	3m 38s
build (windows-latest)	3m 33s
build (windows-latest)	10m 6s
build (ubuntu-latest, --all-features)	6m 7s
build (ubuntu-latest, --all-features)	6m 7s
Check protos	27s
Check protos	27s
Check that MkDocs can build the docs	14s
Check that MkDocs can build the docs	14s
Check formatting	15s
Check formatting	15s
Clippy check	2m 59s
Clippy check	2m 59s
cargo-deny (advisories)	22s
cargo-deny (advisories)	22s
Check that MkDocs can build the docs with latest Python and uv	14s
Check that MkDocs can build the docs with latest Python and uv	14s
cargo-deny (bans licenses sources)	23s
cargo-deny (bans licenses sources)	23s
	1h 13m 57s

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