ci: allow any command for Renovate post-upgrade tasks
ci: allow any command for Renovate post-upgrade tasks

The [allowedPostUpgradeCommands][1] pattern list is used to determine
whether a [post-upgrade task][2] command is allowed to be run by
Renovate. Having to explicitly allow each command creates unnecessary
friction.

This commit allows any command to be run in a post-upgrade task, which
saves us the trouble of having to update the allowed commands pattern
list every time we want to add a new post-upgrade task.
Since adding/modifying Renovate post-upgrade tasks is subject to the
regular PR review workflow, unwanted commands will be caught there.

[1]: https://docs.renovatebot.com/self-hosted-configuration/#allowedpostupgradecommands
[2]: https://docs.renovatebot.com/configuration-options/#postupgradetasks

angular/dev-infra,angular/dev-infra,angular/dev-infra,angular/dev-infra