openvswitch: fix intree tunnel recursive dependency

openvswitch: fix intree tunnel recursive dependency

Remove PROVIDES from all OVS kernel packages. The provider-
alternation logic in scripts/package-metadata.pl generates
recursive Kconfig dependencies when kmod-openvswitch-intree
provides kmod-openvswitch, because userspace packages
(openvswitch, ovsd, ovn-host) that +depend on kmod-openvswitch
get cross-referenced against the intree provider via
PACKAGE_<provider> < PACKAGE_<requester> conditions.

Verified locally: make defconfig produces zero OVS-related
recursive dependency errors with PROVIDES removed entirely.
The previous selective approach (keeping PROVIDES only for
openvswitch-intree) did not resolve the userspace recursion.

Users must install kmod-openvswitch-intree explicitly instead
of relying on provider alternation.

Fixes: openwrt/openwrt#22664
Signed-off-by: Joshua Klinesmith <redacted>
Co-Authored-By: Claude Opus 4.6 (1M context) <redacted>