Prepare for better device categorization by moving everything to testing
subdir first.
[skip-ci]: chicken-egg problem: passing pmaports CI depends on pmbootstrap MR
depends on this MR
Related: postmarketos#16
This reverts commit ee659a5bb4
and increases the pkgrels of all affected linux pmaports.
I have compiled *every single kernel* that was modified with this
commit, and it worked. That took 12 hours. So I'm pretty confident that
this is a good commit. Let's roll it out and go back to stability \o/
I'll kick off the binary repo building directly after pushing this, but
it will take some time until all binary packages are available again.
[skip ci]: it wouldn't finish in time.
