Add SAA TemporalNexusOperation handling #5513

Job	Run time
cloud-test	1m 56s
test-latest-deps	10m 47s
features-tests / test	9m 17s
build-lint-test (3.14, macos-arm)	10m 19s
build-lint-test (3.10, ubuntu-arm)	12m 22s
build-lint-test (3.14, ubuntu-arm)	11m 49s
check-protos	9m 9s
build-lint-test (3.14, ubuntu-latest)	16m 17s
build-lint-test (3.10, ubuntu-latest)	15m 25s
build-lint-test (3.14, windows-latest)	16m 49s
build-lint-test (3.10, macos-arm)	8m 7s
build-lint-test (3.10, windows-latest)	20m 25s
	2h 22m 42s

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