telemetry(auth): emit metric for createToken

[chungjac]

Problem

need to emit createToken metric from client

Solution

add createToken metric

Testing

[rli]

let's use OTel for new metrics

Telemetry.auth.ssoTokenOperation { metric ->
    try {
        client.createToken {...}
        metric.grantType(...)
        // duration should be automatically calculated
    } catch (e: Exception) {
        metric.httpStatusCode(...)
        // reason/reasonDesc should be automatically populated but confirm
        throw e
    }
}