WEB-2502 - shortcodes should use generated name when name collisions occur

[davidejones]

What does this PR do?

When there is a name collision with integrations we weren't updating the shortcode to reference the new generated name. This PR fixes this.

Motivation

https://datadoghq.atlassian.net/browse/WEB-2502

Preview

https://docs-staging.datadoghq.com/david.jones/int-shortcodes/integrations/amazon_kafka/ https://docs-staging.datadoghq.com/david.jones/int-shortcodes/integrations/amazon_msk/

Additional Notes

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Reviewer checklist

• [ ] Review the changed files.
• [ ] Review the URLs listed in the Preview section.
• [ ] Check images for PII
• [ ] Review any mentions of "Contact Datadog support" for internal support documentation.