feat(http): maxRequestsPerSecond (#18325)

docs/usage/configuration-options.md

lib/config/options/index.ts

lib/modules/platform/github/index.spec.ts

lib/types/host-rules.ts

lib/util/http/host-rules.ts

lib/util/http/index.spec.ts

lib/util/http/index.ts

lib/util/http/queue.spec.ts

lib/util/http/queue.ts

lib/util/http/throttle.spec.ts

lib/util/http/throttle.ts

lib/workers/global/index.ts

lib/workers/repository/index.ts

lib/workers/repository/init/merge.ts

package.json

yarn.lock