feat(orioledb): rename orioledb from Public Alpha to Public Beta in dashboard (#50975)

## Problem

We need to rename orioledb in Dashboard.

## Solution

- Update Studio copy/badges referencing OrioleDB from "Public Alpha" to
"Public Beta" (project creation advanced config, restore-to-new-project,
PITR empty state)
- Remove the scheduled-backups block that hid backups for OrioleDB
projects — OrioleDB now has WAL-G scheduled backups in beta, so that
page should behave normally. PITR keeps its existing guard since PITR is
not yet supported for OrioleDB.
- Update the `useOrioleDb` telemetry property doc-comment to reflect the
beta status
- Update project-creation wizard test expectations/fixtures accordingly
(`release_channel: 'beta'`)

Marketing (`apps/www`) and docs (`apps/docs`) references to OrioleDB
alpha status are being updated separately.

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## Checklist

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- [x] I have read
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<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Updates**
* OrioleDB is now labeled as being in public beta rather than public
alpha, and project creation selects the beta release channel.
* Restore-to-new-project and Point-in-Time Recovery notices clarify that
these features are unavailable for OrioleDB projects.
* OrioleDB projects now follow the standard eligibility checks and page
flow for scheduled backups.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/common/telemetry-constants.ts

@@ -427,7 +427,7 @@ export interface ProjectCreationSimpleVersionSubmittedEvent {
     useApiSchema?: boolean
     /**
      * Postgres engine type selection.
-     * true = "Postgres with OrioleDB" (alpha)
+     * true = "Postgres with OrioleDB" (beta)
      * false = "Postgres" (default)
      */
     useOrioleDb?: boolean