search: Disable auto versioning in glent

This wasn't enabled in the airflow 1 version, but was mistakenly enabled when migrating to airflow 2. Due to how the ingestion code uses the object prefix to name the index in elasticsearch the use of auto versioning makes the resulting files uningestible.

Longer term the ingestion side should be adjusted to make it work appropriately with the auto versioned uploads, but for now the best course of action is to restore the upload to how it worked prior to the migration.

Bug: T329872