System Nexus payload handling from WIT #5405

Job	Run time
check-protos	2m 1s
test-latest-deps	10m 53s
build-lint-test (3.14, windows-latest)	14m 51s
build-lint-test (3.10, ubuntu-arm)	12m 12s
build-lint-test (3.14, macos-arm)	11m 39s
cloud-test	2m 0s
build-lint-test (3.10, ubuntu-latest)	14m 48s
build-lint-test (3.14, ubuntu-arm)	12m 30s
features-tests / test	8m 21s
build-lint-test (3.10, macos-arm)	10m 17s
build-lint-test (3.14, ubuntu-latest)	17m 24s
build-lint-test (3.10, windows-latest)	20m 45s
	2h 17m 41s

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