Fixed #171 Log context passed directly to telemetry body.

[danielmorell]

Description of the change

This resolves a bug in how log context is passed to telemetry. It moves the context to a context key in the extra data in the telemetry body.

Without this context array keys that also match telemetry body defined keys could throw type errors if the types don't match.

Type of change

• Bug fix (non-breaking change that fixes an issue)

Related issues

• Fix Rollbar\Payload\TelemetryBody::__construct(): Argument #6 ($stack) must be of type ?string #171

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers assigned
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