Telemetry should be working even when the api server is disabled.

[robert-zaremba]

Summary of Bug

Telemetry sinks are only initialized when both api.enabled = true and telemetry.enabled = true and only in startInProcess mode (with tendermint in process). See the flow:

• https://github.com/cosmos/cosmos-sdk/blob/3283617/server/start.go#L322
• https://github.com/cosmos/cosmos-sdk/blob/3283617/server/api/server.go#L91

Expected: Telemetry should be correctly initialized when telemetry.enabled = true even when api.enabled = false

Version

3283617, v0.46-rc1

Steps to Reproduce

Start an app with telemetry enabled and api disabled. Add some logs to check that telemetry is not enabled.

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