[ci] Fix runtime_prereleases (#34722)

When using the "only" or "skip" option in the workflow, we were adding
the `--skipTests` param, but that isn't an actual option:
https://github.com/facebook/react/blob/1de32a5e75fe96ac3c1b728a117010e11673f6ed/scripts/release/publish-commands/parse-params.js