API scalability: Implement suggested improvements

[lizkrznarich]

Service/repository new-deployment, ror-api

Describe the desired state/solution Implement recommendations to scale ror-api containers and Elasticsearch clusters from https://github.com/ror-community/ror-roadmap/issues/157 and https://github.com/ror-community/ror-roadmap/issues/156

Testing steps

• [x] Full index on dev
• [x] Load test on dev
• [x] Incremental index on dev

[lizkrznarich]

https://github.com/ror-community/new-deployment/pull/138 https://github.com/ror-community/ror-api/pull/303