Have one entrypoint script for ubi and udi #23281
Description
Is your task related to a problem? Please describe
Currently there is an entrypoint file under base/ubi9 and universal/ubi9.
A second entrypoint file was introduced for universal/ubi when kubedock was introduced as a udi-specific feature in this PR here.
Since the ubi was updated to include kubedock functionalities here, a separate entrypoint file for the ubi and udi is not required
Describe the solution you'd like
Maintain only one entrypoint.sh in base/ubi9, and remove the entrypoint.sh in universal/ubi9
Describe alternatives you've considered
No response
Additional context
No response
