Enable temp accounts by default
As part of the general effort to acquiant the technical and product community with temporary accounts, it would be helpful to set the default on Patch Demo wikis to enable temporary accounts, ahead of the work to enable temporary accounts across WMF wikis in 2024 and 2025.
By enabling by default, we increase the likelihood of surfacing edge case technical and UX issues prior to deployment to production wikis.
Change-Id: I61be119b87016eed93463fad0f16e750b63d1cc5