RESTRICT AUTOMERGE: BUILDER_EXTRAS_OVERRIDE to false

This reverts commit f9dea613a602ca4da81c1b78b9cbbcf886693874.

Reason for revert: This has soaked in udc-qpr1 for a while, now in advance of the udc cut, to promote stability, we want to roll this back and restrict automerge to main

Change-Id: I7f4a01a89233f11bcf162536552d3c70351c504a
Bug: 280783617
1 file changed