Restructures nightly-bench-10tps and nightly-spartan-bench (tps, proving,
block-capacity) to deploy the network via deploy-network.yml on the runner,
wait for the first L2 block, then run the benchmark with SKIP_NETWORK_DEPLOY=1,
cutting the SSM Undeliverable failures from the long deploy-inside-SSM command.
Adds SKIP_NETWORK_DEPLOY plumbing to the network-bench / network-block-capacity-bench
/ network-bench-10tps ci3 commands.

Bundles the helper changes from #23395 (deploy-network.yml notify_on_failure,
spartan wait_for_l2_block, proving-bench SKIP_NETWORK_DEPLOY) so the PR is
self-contained on next, where #23395 has not yet landed.