When the pod starts, add host aliases to the /etc/hosts file

[gitlabsam]

When trino needs to access multiple clusters, the hosts for external cluster interactions need to be added to the /etc/hosts file, otherwise the IP of domain name format may not be reachable. Therefore, I added this feature to add the specified host aliases to the /etc/hosts file when the pod starts.

[cla-bot]

Thank you for your pull request and welcome to the Trino community. We require contributors to sign our Contributor License Agreement, and we don't seem to have you on file. Continue to work with us on the review and improvements in this PR, and submit the signed CLA to cla@trino.io. Photos, scans, or digitally-signed PDF files are all suitable. Processing may take a few days. The CLA needs to be on file before we merge your changes. For more information, see https://github.com/trinodb/cla

[nineinchnick]

This seems to have a very specific use case. Can you add a test for this, similar to https://github.com/trinodb/charts/blob/main/charts/trino/templates/tests/test-connection.yaml, and configure it in https://github.com/trinodb/charts/blob/main/test-values.yaml?

[nineinchnick]

This looks abandoned.