run_locally.sh: enable simulations with tc netem; add corresponding CI jobs for crdb/ybdb

[mickmis]

• in containers of crdb and ybdb: if an env variable for configuring tc netem is present, install tc through an entrypoint script; keep existing default behavior when not set
• make start-locally now waits for the deployment to be ready before returning
• updated some documentation for the ports mapping (ideally should have been done in run_locally.sh: refactor to run any number of nodes, defaults to two #1420)
• adds in CI jobs running the configuration 'minimal_probing' with the simulated deployment (two USSs, two nodes per USS, so 4 in total)

Evidence for CRDB:

[mickmis]

• --wait implies -d
• We need that for the ybdb deployment, as it is slower to be ready, and by the time the mocks are started and the uss_qualifier starts testing, the DSS is actually still not ready. Additionally it does IMO make sense for make start-locally to return once the stack is actually ready.