Fix 'last_updated_by' showing incorrect data for newly created tests"

[bkowshik]

Describe the bug

When a new test is created, the last_updated_by column has the value false in it.

To Reproduce

1. Open up Tests from the Configuration menu.
2. Add a new test using the Add Test button and click on Add to save the test.
3. View the last_update_by column in the table with all tests.

Expected behavior

User details are taken from the appsmith object and updated in the database.

Desktop

• OS: Macbook Pro - 13.5 (22G74)
• Browser Google Chrome
• Version 131.0.6778.205 (Official Build) (arm64)