Removes the temporary killswitch that was blocking tracing in production
environments.
Note this still excludes from tracing projects that are any of the
following:
- HIPAA sensitive
- Hosted in EU regions
- Within orgs where some owner previously signed our DPA
See [approval
message](https://supabase.slack.com/archives/C051L8U2EJF/p1775526578561789?thread_ts=1775144006.270549&cid=C051L8U2EJF)
for context.
Closes AI-450
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## Summary by CodeRabbit
* **Bug Fixes**
* Tracing enablement now depends solely on the presence of required API
credentials instead of environment-based restrictions, enabling
diagnostic tracing functionality across all environments.
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