add Quadlet configuration and RPM packaging

[seantronsen]

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Description

Fixes #101

Warning

This PR is still awaiting two decisions:

1. should secrets generation for podman stay in the release repo or migrate to each service repo?
2. should configuration from shared configuration files like openchami.env in the release repo be migrated to each service repo? We could use a sane override pattern as shown below, albeit at the cost of noise:

[Container]
...
EnvironmentFile=/etc/openchami/configs/<svc-name>.env
EnvironmentFile=-/etc/openchami/configs/openchami.env

The todo comments marked in several places in the code from this PR echo the questions posed above.

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Dependency update

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