`kctrl package installed delete` has no `--wait` option

**Describe the problem/challenge you have**

I want to handle myself the waiting for both installation and removal of a package.
During installation I can provide the `--wait=false` flag to the `kctrl package install` command, but unfortunately such an option is not available to the `kctrl package installed delete` command.

**Describe the solution you'd like**

The same `--wait` flag should be made available to `kctrl package installed delete` command, too, and make the command behave accordingly:
`true` (default): the command returns only after the package has been completely removed, like it's behaving as of today;
`false`: the command returns immediately with exit code 0 and should completely detach from the uninstall process that's been taken care of by kapp-controller.

**Anything else you would like to add:**

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We are also happy to receive and review Pull Requests if you want to help working on this issue.

Start at the `kctrl package installed delete` command entry point and compare its handling with `kctrl package install --wait=false`. Verify the default waits for complete removal, while `--wait=false` returns successfully without waiting for kapp-controller's uninstall process; run the relevant command tests if present.

Written by the indexing model from the issue text.