Unexpected options `Test-tmp` and `Testing` in credential form

Describe the bug

When creating a new credential, the credential modal displays unexpected options: Test-tmp and Testing. These options are not expected in the list of available credentials.

Version number

The version of Lightning where the bug was observed:

• v2.10.4

If you're running locally with an unreleased version, include the commit SHA: 19bd2bf0fd

I have reproduced this locally on main:

• Yes
• No

To Reproduce

Steps to reproduce the behavior:

1. Navigate to the "Credentials" section.
2. Click on "Add New Credential."
3. Open the dropdown list to select a credential.
4. Observe the presence of unexpected options: Test-tmp and Testing.

Expected behavior

Only valid adaptors and user-defined OAuth credential options should appear in the list. The Test-tmp and Testing options should not be displayed.

Screenshots

A screenshots of the credential form showing the unexpected options.

Start in the Credentials section at the Add New Credential flow and reproduce the dropdown behavior described in the issue. Trace where the available credential options are assembled, then verify that only valid adaptors and user-defined OAuth options remain and that Test-tmp and Testing no longer appear.