ci: Disable NFS locking
ci: Disable NFS locking

This is an attempt to fix the recent issues with NFS locking in CI, e.g.
issue #16551

From the nfs(5) manpage:

> When using the nolock option, applications can lock files, but such
> locks provide exclusion only against other applications running on
> the same client.  Remote applications are not affected by these locks.

Since in CI, we do not have any remote applications accessing the shared
folder, only using local locks should be safe and more robust than using
distributed locking.

Signed-off-by: Sebastian Wicki <db043b2055cb3a47b2eb0b5aebf4e114a8c24a5a@isovalent.com>

cilium/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,tklauser/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,michi-covalent/cilium,michi-covalent/cilium,tklauser/cilium