fix(docs): Update getting-started script pre-24.11

[adwk67]

Check and Update Getting Started Script

Part of stackabletech/issues#657.
Use server-side to ensure null fields are not overwritten. Port-forward on bootstrap. kcat in place of kafkacat.

N.B. may not need the external-unstable-ip once stackabletech/listener-operator#244 is merged.

Note

During a Stackable release we need to check (and optionally update) the
getting-started scripts to ensure they still work after product and operator
updates.

# Some of the scripts are in a code/ subdirectory
# pushd docs/modules/superset/examples/getting_started
# pushd docs/modules/superset/examples/getting_started/code
pushd $(fd -td getting_started | grep examples); cd code 2>/dev/null || true

# Make a fresh cluster (~12 seconds)
kind delete cluster && kind create cluster
./getting_started.sh stackablectl

# Make a fresh cluster (~12 seconds)
kind delete cluster && kind create cluster
./getting_started.sh helm

popd

[NickLarsenNZ]

LGTM