[CI/CD] Add release environment to the backport job #15443

Job	Run time
check-dependency-rules	9s
check-markdown	13s
check-fail-ci	10s
check-readme	3m 5s
check-workspace	19s
preflight / preflight	1m 19s
preflight / ci-versions	1m 13s
test-rust-features	2m 23s
fmt	1m 23s
check-rust-feature-propagation	2m 18s
check-toml-format	1m 14s
check-umbrella	2m 30s
All quick checks passed	1s
	16m 17s

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