Memgraph values updated

[EvanDietzMorris]

• updates all of the values files for the new neo4j & memgraph format
• go ahead and force the app.neo4j.dataUrl format and remove dataUrl from the top level, we'll fix things if they break
• add new schema and graph-metadata files to plater but keep them optional

[hyi]

Looks good to me. Since the PR is to be merged into the memgraph branch, I am approving it so you can merge it. Then we will need to test memgraph deployment once you return to work to make sure everything indeed works before merging the memgraph branch to master.

[hyi]

@EvanDietzMorris Just a quick note that resources needed for memgraph will need to be configured for each plater instance in values-populated.yaml file, similar to the neo4j block before deploying memgraph backend plater instances. I've got translator kg plater instances for both memgraph and neo4j backends deployed successfully in translator-dev namespace, so I think adding a memgraph block in values-populated.yaml file for each plater instance should be sufficient to deploy a memgraph plater instance.