Extracting proxy role and preparing for CDK

[citizen-stig]

• Extract nginx setup from rollup role
• Migrate https://github.com/Sovereign-Labs/ubuntu-evm-starter-script here and use templating
• Observability (new features)
  • Nginx metrics plus telegraf collector
  • Alloy logs exporter (opt-in)

Following params can be present in runtime_vars for proxy:

deployment_name: "nikolai-ansible-proxy-2"
switches: "cp"  # Commmon + proxy
disk_profile: "aws_simple" # Can do different or skpi
proxy_rollup_leader_ip: "127.0.0.1"
rollup_http_port: 12346
proxy_ssl_enabled: true
proxy_domain_name: "foo-rollup-1.sov-obs.xyz"
proxy_unlimited_domains: ["bar-rollup-1.sov-obs.xyz","baz-rollup-1.sov-obs.xyz"]
proxy_rate_limit_enabled: true
proxy_rate_limit_exempt_ips: ["37.27.235.102", " 37.27.235.103"]
proxy_enable_logs_export: false

Adds https://docs.influxdata.com/telegraf/v1/input-plugins/nginx/ inputs

[citizen-stig]

Added a fix for swagger being usable by setting public_address value in rollup_config.toml:

[preston-evans98]

Sorry, I know we're tracking a moving target here - but we'll need to add the s3 fetch and sync logic from https://github.com/Sovereign-Labs/sov-rollup-cdk-starter/pull/50

[citizen-stig]

Yep, I will convert this PR to draft.

[preston-evans98]

Looks good to me, other than needing support for the zero-downtime proxy replacement changes that just merged into CDK.

I assume you've tested this out with a personal CDK deploy already. If not, that's probably worth doing before merging as well.