kvstore/store: refactor syncLocalKey{,s} to take a lease argument
kvstore/store: refactor syncLocalKey{,s} to take a lease argument

Rather that always setting lease=true in the call to the backend's
UpdateIfDifferent method, allow callers to request attachment of a
lease. Convert all current callers to call with lease=true.

Refactoring change only, no change in functionality.

Signed-off-by: Tobias Klauser <059b8b880f8441509ec8a65b50b4c6ae74ebea76@cilium.io>

cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium