fix(k8s): Endpoints discovery port names/numbers are configurable (backport #1862)

[mergify]

This is an automatic backport of pull request #1862 done by Mergify.

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[github-actions]

Hi @mergify[bot]! Add at least one of the required labels to this PR

Required labels are : chore,ci,cleanup,docs,feat,fix,perf,refactor,style,test

[andrewazores]

/build_test

[github-actions]

Workflow started at 2/12/2024, 2:32:40 PM. View Actions Run.

[github-actions]

ARCH	IMAGE
amd64	ghcr.io/cryostatio/cryostat:pr-1874-6e32f68ce55add15da84550840bbe883ce816391-linux-amd64
arm64	ghcr.io/cryostatio/cryostat:pr-1874-6e32f68ce55add15da84550840bbe883ce816391-linux-arm64

To run smoketest:

# amd64
CRYOSTAT_IMAGE=ghcr.io/cryostatio/cryostat:pr-1874-6e32f68ce55add15da84550840bbe883ce816391-linux-amd64 sh smoketest.sh

# or arm64
CRYOSTAT_IMAGE=ghcr.io/cryostatio/cryostat:pr-1874-6e32f68ce55add15da84550840bbe883ce816391-linux-arm64 sh smoketest.sh

[github-actions]

/build_test : At least one test failed ❌.
View Actions Run.

[andrewazores]

Failed because the requested -core version wasn't downloadable by CI. Annoying. Testing locally instead.