Some tooling was brought in from angular/components to help with bundling spec files for Karma. This tooling has since been ported over to the dev-infra repo. This commit dedupes the tooling and instead depends on the angular/dev-infra-private repo.
Previously we were running Cypress with bazel in an effort to save on CI time when devtools dependencies did not change. This commit reverts to running Cypress manually, until we can revisit building devtools with local Angular packages to save CI time.
