Add nexus-operation-token header to nexus callback headers for Tempor… #5446

Job	Run time
build-lint-test (3.10, ubuntu-arm)	12m 18s
test-latest-deps	11m 26s
build-lint-test (3.10, ubuntu-latest)	15m 42s
build-lint-test (3.10, macos-arm)	9m 52s
check-protos	8m 25s
build-lint-test (3.14, windows-latest)	19m 31s
cloud-test	2m 11s
build-lint-test (3.14, macos-arm)	10m 25s
build-lint-test (3.14, ubuntu-latest)	18m 1s
features-tests / test	8m 35s
build-lint-test (3.14, ubuntu-arm)	12m 11s
build-lint-test (3.10, windows-latest)	19m 13s
	2h 27m 50s

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