build

git: add config to disable abandoning of unreachable commits #7703

Job	Run time
build (ubuntu-latest)	10m 27s
cargo-deny (advisories)	35s
Check formatting	19s
build (macos-13)	4m 54s
Clippy check	3m 39s
cargo-deny (bans licenses sources)	30s
build (windows-latest)	10m 8s
build (ubuntu-latest, --all-features)	9m 24s
Check protos	1m 6s
Check that MkDocs can build the docs	25s
	41m 27s

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