Add git to ubuntu.Dockerfile #3732

Job	Run time
pre-commit / pre-commit	1m 55s
ubuntu / clang-build (ubuntu-24.04-arm)	1m 47s
ubuntu / gcc-build (ubuntu-24.04, Release)	1m 59s
ubuntu / gcc-build (ubuntu-24.04-arm, Release)	1m 23s
ubuntu / gcc-build (ubuntu-24.04-arm, Debug)	1m 30s
ubuntu / clang-build (ubuntu-24.04)	1m 45s
mac / clang-build (Release)	1m 53s
windows / clang-build	2m 16s
mac / clang-build (Debug)	1m 46s
windows / msvc-build (Release)	1m 40s
windows / msvc-build (Debug)	2m 53s
ubuntu / gcc-build (ubuntu-24.04, Debug)	2m 12s
ubuntu / clang-sanitizer-build (ubuntu-24.04)	2m 34s
ubuntu / clang-test (ubuntu-24.04-arm)	9m 24s
ubuntu / clang-test (ubuntu-24.04)	9m 30s
windows / clang-test	2m 59s
ubuntu / gcc-test (ubuntu-24.04-arm)	8m 33s
ubuntu / gcc-test (ubuntu-24.04)	9m 20s
mac / clang-test	5m 10s
windows / msvc-test	5m 1s
ubuntu / clang-sanitizer-test (ubuntu-24.04)	3m 5s
windows / clang-test-extended	2m 59s
mac / clang-test-extended	3m 15s
windows / msvc-test-extended	3m 3s
ubuntu / clang-sanitizer-test-extended (ubuntu-24.04)	2m 43s
ubuntu / clang-test-extended (ubuntu-24.04)	4m 46s
ubuntu / clang-test-extended (ubuntu-24.04-arm)	5m 6s
ubuntu / gcc-test-extended (ubuntu-24.04-arm)	4m 42s
ubuntu / gcc-test-extended (ubuntu-24.04)	5m 22s
ubuntu / gcc-build-codecov	8m 40s
perf / ubuntu-gcc-build-perf-stats	2m 20s
perf / macos-clang-build-perf-stats	1m 47s
pages / build-scoreboard	19s
pages / build-doxygen-xml	27s
pages / build-sphinx	1m 26s
pages / deploy-pages	0s
	2h 5m 30s

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