Remove Vault LDAP feature flag

[priya-patel04]

Description

Removes vault-ldap-credential feature flag.

We added this flag to hide the UI work from the previous release, since this feature will be part of upcoming GA release we are now removing it.

🎟️ Jira ticket

Screenshots (if appropriate)

How to Test

Checklist

• I have added before and after screenshots for UI changes
• I have added JSON response output for API changes
• I have added steps to reproduce and test for bug fixes in the description
• I have commented on my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have added a11y-tests label to run a11y audit tests if needed

PCI review checklist

• I have documented a clear reason for, and description of, the change I am making.
• If applicable, I've documented a plan to revert these changes if they require more than reverting the pull request.
• If applicable, I've documented the impact of any changes to security controls.
  Examples of changes to security controls include using new access control methods, adding or removing logging pipelines, etc.

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Project	Deployment	Preview	Comments	Updated (UTC)
boundary-ui	Ready	Preview	Comment	Nov 5, 2025 7:05pm
boundary-ui-desktop	Ready	Preview	Comment	Nov 5, 2025 7:05pm

[lisbet-alvarez]

Looks good!!

[DhariniJeeva]

looks good!