Move database type along with relevant metadata to the database schema

[adamkorynta]

Component to be refactored
The REST API currently requires configuration inputs to determine what database it is connecting to.

Purpose of refactoring
Less configuration for deployment.

Proposed method
Add information to the database schema which could tell the REST API which database (oracle/postgresql/etc) and which type (CWMS/OpenTSDB/HDB/etc) instead of needing to add additional configuration parameters.

Additional context
Brought up in PR: #186 (comment)

[MikeNeilson]

well, hard to put the database engine in a query and query it without knowing, but shouldn't be too much of an issue to keep the table simple enough it doesn't really matter and we can get the "type".

We definitely need to get away from the isOracle/PG, isCwms/HDB/etc checks over time as 1. it just makes the code easier to read, and 2. kinda benefits the project to let additional usages slurp in the concept with OpenDCS needing to know about them.

[MikeNeilson]

This is now more practical with the correction opendcs/opendcs#1367

[MikeNeilson]

opendcs/opendcs#1511

needed a few more tweaks... because of course oracle can be sane.