Aerospike connection settings

[bewebi]

Description

API change needed for solo-io/solo-projects#5644

Note: additional fields are likely to be added as described in Slack here

API changes

• Added fields to AerospikeApiKeyStorage message, corresponding with Aerospike client settings with descriptions from Aerospike docs

Context

Consumed by solo-io/ext-auth-service#706 and solo-io/solo-projects#5661

Interesting decisions

Alternatives would be to add these settings to a new sub-message or a generic map field, however they are ruled out for the following reasons:

• A sub-message for client settings might make logical sense, however TLS settings which also configure the client are already present in AerospikeApiKeyStorage and so we opt to follow the existing pattern
• A generic map would theoretically allow us to account for any settings in code without a future API change, however it would then be unclear exactly what we support, at least until an error occurs at runtime

Testing steps

This PR only contains API changes, see extauth and solo-projects PRs for functionality changes

Notes for reviewers

Consider this PR alongside the extauth and solo-projects PRs

Checklist:

• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works