recipes-graphics/wayland/weston-ini-conf: Remove grcp-server.cfg

And add it meta-agl/mega-agl-core, like all our other ini configuration.
Reason being we group all our ini config files there, and this is
harmless, it won't depend on anything. We already build grpc-proxy
PACKAGECONFIG for agl-demo, starting with octopus.

This is basically a revert of 1b347d8823,
'[weston-ini-conf] Fix dependency issue with grpc in meta-agl-core'

Bug-AGL: SPEC-4776
Change-Id: I2502a3828d7c3a71707fac7cc535df6c312eabc5
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Suggested-by: Scott Murray <scott.murray@konsulko.com>