* helm: dedupe merged extraEnvironmentVars in workloads * address comments Co-Authored-By: Copilot <223556219+Copilot@users.noreply.github.com> * range Co-Authored-By: Copilot <223556219+Copilot@users.noreply.github.com> * helm: reuse merge helper for extraEnvironmentVars --------- Co-authored-by: Copilot <copilot@github.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>