devel/py-python-jsonrpc-server: Deprecate and mark broken

There is no new version in 6 years, the upstream build and CI are
failing and nothing depends on this port, hence the removal.

PR: 296894
Approved by: Goran Mekić <meka@sys.it.com> (maintainer)
Sponsored by: UNIS Labs
MFH: 2026Q3