Use gitoxide in get_diff #9901

Job	Run time
udeps	8m 4s
Lints	4m 24s
build-apple-x86 (nightly)	8m 46s
build-apple-x86 (1.82)	8m 59s
build-linux-musl (nightly)	6m 21s
build-linux-musl (1.82)	6m 42s
build-linux-musl (stable)	6m 22s
Changelog Test	5s
build-linux-arm (stable)	19m 46s
build-linux-arm (1.82)	7m 8s
build-linux-arm (nightly)	19m 1s
build-apple-x86 (stable)	8m 20s
build (ubuntu-latest, stable)	2m 49s
Test Homebrew Formula (macOS)	4m 7s
build (windows-latest, stable)	12m 20s
build (macos-latest, stable)	2m 56s
build (macos-latest, nightly)	4m 34s
build (macos-latest, 1.82)	1m 39s
build (ubuntu-latest, 1.82)	3m 20s
build (windows-latest, 1.82)	2m 19s
build (windows-latest, nightly)	11m 28s
build (ubuntu-latest, nightly)	2m 58s
	2h 32m 28s

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