refactor: use re2 for regex (#4687)

lib/config/presets.ts

lib/config/validation.ts

lib/datasource/go/index.ts

lib/manager/ansible/update.ts

lib/manager/bazel/extract.ts

lib/manager/bazel/update.ts

lib/manager/buildkite/update.ts

lib/manager/bundler/extract.ts

package.json

test/config/__snapshots__/validation.spec.ts.snap

test/config/validation.spec.ts