Add Codesandbox metrics to usage ping

What does this MR do?

Adds usage ping data for the following CodeSandbox actions:

• When the instance enables the setting
• When the instance actually performs the preview

Closes #24837 (closed)

In https://gitlab.com/gitlab-services/version-gitlab-com/merge_requests/240 we added the column web_ide_clientside_preview_enabled in the UsagePing table in the versions project.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Separation of EE specific content