fix(telemetry): add result parameter when emitting telemetry (#7378)

## Problem
Users are seeing `telemetry: invalid Metric:
"codewhisperer_clientComponentLatency" emitted without the `result`
property, which is always required. Consider using `.run()` instead of
`.emit()`, which will set these properties automatically. See
https://github.com/aws/aws-toolkit-vscode/blob/master/docs/telemetry.md#guidelines`

## Solution
Add result attribute when emitting the metric

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: opieter-aws

packages/core/src/codewhisperer/util/telemetryHelper.ts

@@ -659,6 +659,7 @@ export class TelemetryHelper {
             codewhispererSessionId: session.sessionId,
             codewhispererTriggerType: session.triggerType,
             credentialStartUrl: AuthUtil.instance.connection?.startUrl,
+            result: 'Succeeded',
         })
     }
     public sendCodeScanEvent(languageId: string, jobId: string) {