Allow flower to optionally recieve db connection parameters as individual components

> [!NOTE]
> Migrated from [augurlabs/augur#3264](https://github.com/augurlabs/augur/issues/3264)
> Originally opened by `@MoralCode` on 2025-09-10

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To enable cloud-native deployment (see https://github.com/oss-aspen/augur-on-ocp) with the CrunchyData Postgres operator (which provides database connection information as individual values), A wrapper is likely needed around the flower container to add some custom logic nearly identical to that in https://github.com/chaoss/augur/pull/3222, allowing the connection string to be either provided as a single string, or as separate values.