Add retry on eager

[gkumbhat]

Changes

• Add eager resolution and make it configurable
• Add retry logic for generation server
• Bump ginepro to my fork to add couple of newish tonic endpoint configuration. Diff: https://github.com/TrueLayer/ginepro/compare/main...gkumbhat:ginepro:add_tonic_endpoint_settings?expand=1

[gkumbhat]

tls-roots is being deprecated

[declark1]

Needs rebase and left a couple of nit comments, but I think this is fine until we find a better client-level solution

[declark1]

Since this is a timeout and not an interval, rename to DEFAULT_RES_STRATEGY_TIMEOUT_SEC and update "interval" to "timeout" accordingly in the config field names

[declark1]

nit: recommend decoupling the timeout and simplifying the match, e.g.

    let resolution_strategy_timeout = Duration::from_secs(
        service_config
            .resolution_strategy_timeout
            .unwrap_or(DEFAULT_RES_STRATEGY_TIMEOUT_SEC),
    );
    let resolution_strategy = match &service_config.resolution_strategy {
        Some(name) if name == "eager" => ResolutionStrategy::Eager {
            timeout: resolution_strategy_timeout,
        },
        _ => ResolutionStrategy::Lazy,
    };

[gkumbhat]

Thanks for the review @declark1 . I have made both of the suggested changes. I'll rebase mine after your PR #391 gets merged and then go with merging this one.