Allow dashes when parsing broker rack

[ctrlaltluc]

Description

This change allows for - (dash) in broker rack values when building the broker to rack map used when enabling parallel broker restarts.

Type of Change

• Bug Fix

[amuraru]

the tests are failing though with there is no scale mock

[dobrerazvan]

LGTM

[ctrlaltluc]

the tests are failing though with there is no scale mock

@amuraru it is the flaky test again from kafkacluster_controller_externalnodeport_test, not related to this PR. It seems that 83868b8 did not fix it.

It is also odd that it is flaky only in our fork, not in upstream. Cannot replicate it on local either.

I will create a task for it, I already spent 1 day earlier this month on it, but could not find the root cause. :(

[ctrlaltluc]

Found it in upstream too. That test is a flaky one not only in our repo.
https://github.com/banzaicloud/koperator/actions/runs/5681154322/job/15396691867?pr=1002

LE: See explanation for upstream failure here, seems the same as we've seen in #67, but curiously enough, the nodeports are still not deleted even with that explicit cleanup.