Set host keys to generate on first-boot

[tenthirtyam]

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Summary of Pull Request

Addressing an issue noticed by @markpeek.

Changes ensure the host keys are cleaned and are generated on the first-boot for uniqueness.

Type of Pull Request

• This is a bug fix.
• This is an enhancement or feature.
• This is a code style / formatting update.
• This is a documentation update.
• This is a refactoring update.
• This is something else.
  Please describe:

Context of the Pull Request*

• For RHEL/RHEL derivative and Photon OS the host keys are removed during cleanup (rm -f /etc/ssh/ssh_host_*) and automatically, by default, are regenerated on the first-boot.

• For Ubuntu, the host keys are removed during cleanup (rm -f /etc/ssh/ssh_host_*) and an /etc/rc.local is added to regenerate on first-boot. Later, if the host keys are missing for any reason, they will be regenerated on reboot. If present, no action.

Related to Existing Issues

Issue Number: N/A

Test and Documentation Coverage

• Tests have been completed (for bug fixes / features).
• Documentation has been added / updated (for bug fixes / features).

Breaking Changes?

• Yes, there are breaking changes.
• No, there are no breaking changes.

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.