Migrate protobuf build from autotools to cmake.
Migrate protobuf-python to use pypi sources which are now required
for setup.py builds:
https://github.com/protocolbuffers/protobuf/tree/v28.1/python#building-from-setuppy
The BR2_or1k workaround is removed, as protobuf depends on
libabseil-cpp, which isn't available on OpenRISC.
The BR2_TOOLCHAIN_HAS_GCC_BUG_85180 workaround is removed, as this
workaround is for Microblaze, and protobuf depends on libabseil-cpp,
which isn't avialable on Microblaze.
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
[Arnout: remove netbird whch was accidentally added]
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>