Template NEWS-3.1
Add the NEWS-3.1 template to S3_1, with the required bootstrap changes (installing the document etc), so we only need to fill the document before releasing beta2.
Equivalent ticket from S3_0 cycle: #41727
S3_1 only (not to later branches)
Add the NEWS-3.1 template to S3_1, with the required bootstrap changes (installing the document etc), so we only need to fill the document before releasing beta2.
Equivalent ticket from S3_0 cycle: #41727