Terminate/Restart workers

[ChrisKujawa]

With #247 we are able to deploy zeebe workers with zbchaos. With this PR we are able to restart and terminate workers, either one or all existing ones.

In this PR I also iterated over the terminate an restart commands and realized that gateway restart was missing. I added this.

Furthermore a new subcommand is added on terminate and restart for the broker, this makes it more understandable what is restarted, instead of using the root restart/terminate command for that.

I plan to do some more refactoring like extracting the duplicated code and reusing logic, but I will do this in a separate PR.

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Example:

Terminate one:

$ ./zbchaos terminate worker -v
Connecting to zell-chaos
Running experiment in self-managed environment.
Terminated worker-99cd57f8b-hmhb5

Terminate all:

$ ./zbchaos terminate worker -v --all
Connecting to zell-chaos
Running experiment in self-managed environment.
Terminated worker-99cd57f8b-lfbck
Terminated worker-99cd57f8b-vjb9l

Restart one

$ ./zbchaos restart worker 
Restart worker-99cd57f8b-4ght7

Restart all

$ ./zbchaos restart worker --all
Restart worker-99cd57f8b-4ght7
Restart worker-99cd57f8b-7t2d9
Restart worker-99cd57f8b-kmrhv

New restart sub-commands:

$ ./zbchaos restart broker
Deleted zell-chaos-zeebe-2
$ ./zbchaos restart gateway
Restarted zell-chaos-zeebe-gateway-5f5c7cb8d6-9529r
$ ./zbchaos restart worker
Restart worker-99cd57f8b-cr6bs

New terminate sub-commands:

$ ./zbchaos terminate broker
Terminated zell-chaos-zeebe-0
$ ./zbchaos terminate gateway
Terminated zell-chaos-zeebe-gateway-5f5c7cb8d6-6jlxn
$ ./zbchaos terminate worker
Terminated worker-99cd57f8b-55tt2