`ng build` by default builds the prodapp because there is not a dev build in Bazel. This PR restores the `--prod` to do the same to prevent achitect from showing missing config error. PR Close #30005
`ng build` by default builds the prodapp because there is not a dev build in Bazel. This PR restores the `--prod` to do the same to prevent achitect from showing missing config error. PR Close #30005