feat: DEVOPS-222 custom ssl policy for load balancers

[pabops]

• Setting minimum TLS 1.2 for LBs.
  Eventually, we could merge the checkpoint and LBs policy, and/or customize further the ssl policy.

[github-actions]

Bencher Report

Branch	devops-222
Testbed	self-hosted

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Benchmark	Latency	Benchmark Result milliseconds (ms) (Result Δ%)	Upper Boundary milliseconds (ms) (Limit %)
full-blocks-erc20-transfers/full-blocks-erc20-transfers	📈 view plot 🚷 view threshold	621.86 ms (-4.73%) Baseline: 652.71 ms	772.29 ms (80.52%)
full-blocks-evm-transfers/full-blocks-evm-transfers	📈 view plot 🚷 view threshold	811.96 ms (-12.28%) Baseline: 925.59 ms	1,125.51 ms (72.14%)
full-blocks-giant-deploy/full-blocks-giant-deploy	📈 view plot 🚷 view threshold	5,113.40 ms (+0.20%) Baseline: 5,103.18 ms	5,530.62 ms (92.46%)
full-blocks-scilla-add/full-blocks-scilla-add	📈 view plot 🚷 view threshold	1,024.10 ms (+1.24%) Baseline: 1,011.56 ms	1,072.31 ms (95.50%)
full-blocks-scilla-load/full-blocks-scilla-load	📈 view plot 🚷 view threshold	5,376.60 ms (+1.40%) Baseline: 5,302.22 ms	6,174.98 ms (87.07%)
full-blocks-scilla-store/full-blocks-scilla-store	📈 view plot 🚷 view threshold	4,292.80 ms (+1.41%) Baseline: 4,233.19 ms	4,888.44 ms (87.82%)
full-blocks-zil-transfers/full-blocks-zil-transfers	📈 view plot 🚷 view threshold	971.88 ms (+4.60%) Baseline: 929.12 ms	1,207.33 ms (80.50%)
process-empty/process-empty	📈 view plot 🚷 view threshold	9.75 ms (-2.81%) Baseline: 10.03 ms	10.64 ms (91.63%)

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